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A certain type of siding for a house costs $10.50 per square yard. Wh

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A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 09 Feb 2018, 00:39
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A certain type of siding for a house costs $10.50 per square yard. What does it cost for the siding for a wall 4 yards wide and 60 feet long?

(A) $800

(B) $840

(C) $2520

(D) $3240

(E) $5040
[Reveal] Spoiler: OA

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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 09 Feb 2018, 00:56
Length of a wall= 60 feet= 20 yard

3 feet= 1 yard

60 feet= \(\frac{1}{3}\)*60= 20 yard

Width of a wall= 4 yard
Area of a wall = 20*4= 80 yard

Cost of siding a wall= 80*10.50= 840

Answer: B.
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 09 Feb 2018, 01:03
B.

we need to know 1 yard=3feet.

Hence area = 4*60/3 = 80 yard²

Cost = 80*10.5 = $840

Bunuel I have a query. Are we supposed to know the conversion factor for yard? IMO question stem must mention that.
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 09 Feb 2018, 02:11
Bunuel wrote:
A certain type of siding for a house costs $10.50 per square yard. What does it cost for the siding for a wall 4 yards wide and 60 feet long?

(A) $800

(B) $840

(C) $2520

(D) $3240

(E) $5040


Cost per sq. yard siding = $10.50
3 ft = 1 yard
60 ft = 60/3 = 20 yard
Area of wall = 20 x 4 = 80 sq. yard
Cost of siding for the wall = 10.50 x 80 = $840

Answer B.
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 10 Feb 2018, 00:30
Bunuel wrote:
A certain type of siding for a house costs $10.50 per square yard. What does it cost for the siding for a wall 4 yards wide and 60 feet long?

(A) $800

(B) $840

(C) $2520

(D) $3240

(E) $5040

i think answer is B as 1 yard= 3 feet
so 60/3= 20
so area of wall is 20*4= 80
and cost per square yard is 10.50.
so 10.50*20= 840
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 10 Feb 2018, 06:47
Length of a wall= 60 feet= 20 yard

3 feet= 1 yard

60 feet= 1/3*60= 20 yard

Width of a wall= 4 yard
Area of a wall = 20*4= 80 yard

Cost of siding a wall= 80*10.50= 840

Answer: B
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 10 Feb 2018, 08:00
Bunuel wrote:
A certain type of siding for a house costs $10.50 per square yard. What does it cost for the siding for a wall 4 yards wide and 60 feet long?

(A) $800

(B) $840

(C) $2520

(D) $3240

(E) $5040

\(4*60*10.50\)

= 2520, Answer must be (C)
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A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post Updated on: 10 Feb 2018, 21:23
Abhishek009 wrote:
Bunuel wrote:
A certain type of siding for a house costs $10.50 per square yard. What does it cost for the siding for a wall 4 yards wide and 60 feet long?

(A) $800

(B) $840

(C) $2520

(D) $3240

(E) $5040

\(4*60*10.50\)

= 2520, Answer must be (C)

You are missing feet to yard conversion.
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Originally posted by Sasindran on 10 Feb 2018, 08:12.
Last edited by Sasindran on 10 Feb 2018, 21:23, edited 1 time in total.
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A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 10 Feb 2018, 19:29
Sasindran wrote:
B.

we need to know 1 yard=3feet.

Hence area = 4*60/3 = 80 yard²

Cost = 80*10.5 = $840

Bunuel I have a query. Are we supposed to know the conversion factor for yard? IMO question stem must mention that.


Hi Sasindran,

Allow me to add my two cents to your query.

As the Cost is mentioned in per Square Yard, we need to convert feet in Yard so that the area will be in Square Yard. IMO, the question need not mention that, as its already understood.

Hi Bunuel,

In GC, do we have any thread containing all the conversions which might be helpful for GMAT?
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 10 Feb 2018, 20:33
rahul16singh28 wrote:
Sasindran wrote:
B.

we need to know 1 yard=3feet.

Hence area = 4*60/3 = 80 yard²

Cost = 80*10.5 = $840

Bunuel I have a query. Are we supposed to know the conversion factor for yard? IMO question stem must mention that.


Hi Sasindran,

Allow me to add my two cents to your query.

As the Cost is mentioned in per Square Yard, we need to convert feet in Yard so that the area will be in Square Yard. IMO, the question need not mention that, as its already understood.

Hi Bunuel,

In GC, do we have any thread containing all the conversions which might be helpful for GMAT?

Thanks for your two cents.

But my query is different. I’m asking about the conversion factor. Yard is prevalent in US and not in the SI system of units. In SI system the equivalent unit can be considered as metre. So people from other countries may not know the conversion factor.


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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 11 Feb 2018, 01:19
Expert's post
rahul16singh28 wrote:
Sasindran wrote:
B.

we need to know 1 yard=3feet.

Hence area = 4*60/3 = 80 yard²

Cost = 80*10.5 = $840

Bunuel I have a query. Are we supposed to know the conversion factor for yard? IMO question stem must mention that.


Hi Sasindran,

Allow me to add my two cents to your query.

As the Cost is mentioned in per Square Yard, we need to convert feet in Yard so that the area will be in Square Yard. IMO, the question need not mention that, as its already understood.

Hi Bunuel,

In GC, do we have any thread containing all the conversions which might be helpful for GMAT?


On the GMAT, the question itself will supply the relative conversions such as this one. Though you should have a few basic ones memorized: 1 hour = 60 minutes, ...

Check other Conversion problems to practice in Special Questions Directory.
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Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: A certain type of siding for a house costs $10.50 per square yard. Wh [#permalink]

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New post 12 Feb 2018, 17:34
Expert's post
Bunuel wrote:
A certain type of siding for a house costs $10.50 per square yard. What does it cost for the siding for a wall 4 yards wide and 60 feet long?

(A) $800

(B) $840

(C) $2520

(D) $3240

(E) $5040


Since 60 feet is 60/3 = 20 yards, the area of the wall is 4 x 20 = 80 yards^2. Thus, it will cost 80 x 10.5 = 840 dollars.

Answer: B
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Re: A certain type of siding for a house costs $10.50 per square yard. Wh   [#permalink] 12 Feb 2018, 17:34
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