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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5

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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 15 Nov 2018, 10:29
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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5 mile there after, then the taxi fare for a 3-mile ride was?

(A) $1.56
(B) $2.40
(C) $3.00
(D) $3.80
(E) $4.20

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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post Updated on: 15 Nov 2018, 12:35
3 miles = 15/5 miles total

first 1/5 mile, cost = $1
after the first 1/5 miles, cost = $0.2, number of 1/5th miles left = 15-1 = 14, hence cost = $0.2*14 = $2.8

Total = $ 3.8

Made a silly error initially and divided 2.8$ by 5. :lol:
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Originally posted by nkin on 15 Nov 2018, 10:44.
Last edited by nkin on 15 Nov 2018, 12:35, edited 1 time in total.
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Re: If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 15 Nov 2018, 11:12
HKD1710 wrote:
If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5 mile there after, then the taxi fare for a 3-mile ride was?

(A) $1.56
(B) $2.40
(C) $3.00
(D) $3.80
(E) $4.20


In a 3 mile ride, the cost of 1st 0.2 mile is $1.

Remaining is 2.8 miles. No of 0.2 miles in 2.8 miles is 14 and each of these costs 0.2$. So total is 1+ 14*0.2 = $3.8.

Hence D.

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Re: If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 15 Nov 2018, 11:13
nkin wrote:
3 miles = 15/5 miles total

first 1//5 mile, cost = $1
after the first 1/5 miles, cost = $0.2 * (15-1)/5 = $0.2*14/5 = $0.56

Total = $ 1.56

Option A


This cannot be correct? If 1st 1/5 = $1, and 1/5ths thereafter = .20, with 14 1/5s left of the trip the cost would simply be 14 x .20 + 1.00.. no?
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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 15 Nov 2018, 11:21
HKD1710 wrote:
If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5 mile there after, then the taxi fare for a 3-mile ride was?

(A) $1.56
(B) $2.40
(C) $3.00
(D) $3.80
(E) $4.20

Project PS Butler : Question #19


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Since 0.2 mile costs 1 USD then we need to find the cost of (3-0.2 =2.8 miles)


0.2 = 0.2
2.8 = x

Cross multiply and get 2.8 USD

so 1 +2.8 = 3.8


Optionally one can apply logic (though i dont know what logic means :lol: )

there are FIVE 20 cents in one dollar

so the first 0.2 mile cost 1 USD, thereafter we are left with 14 (0.2*14 =2.8)

2.8+1 = 3.8
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Re: If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 15 Nov 2018, 11:29
nkin wrote:
3 miles = 15/5 miles total

first 1//5 mile, cost = $1
after the first 1/5 miles, cost = $0.2 * (15-1)/5 = $0.2*14/5 = $0.56

Total = $ 1.56

Option A



hello nkin :) hope you are having fun time on gmatclub :lol:
you know i didnt quite get how you got this 3 miles = 15/5 miles total can you pls just briefly explain :grin:
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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 15 Nov 2018, 12:32
1
dave13 wrote:
nkin wrote:
3 miles = 15/5 miles total

first 1//5 mile, cost = $1
after the first 1/5 miles, cost = $0.2 * (15-1)/5 = $0.2*14/5 = $0.56

Total = $ 1.56

Option A



hello nkin :) hope you are having fun time on gmatclub :lol:
you know i didnt quite get how you got this 3 miles = 15/5 miles total can you pls just briefly explain :grin:


Yep silly mistake! 14/5 miles left, which means 14 times cost of 1/5 miles which is 14*0.2 = 2.8

BTW, dave13, there's nothing wrong with 3 miles = (15/5) miles! :tongue_opt1 :tongue_opt1
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Re: If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 16 Nov 2018, 03:39
For first 1/5 miles = $1. fixed.
total mile = 3
no of mile left = 3 - 1/5 = 14 / 5 .

Now we have to find out how many 1/5 lies in 14/5. to do so we need to divide 14 / 5 .

(14/5) / 1/5 = 14.

14*0.2 = 2.8

Total = 2.8 + 1 = 3.8.

The best answer is D.
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Re: If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 27 Nov 2018, 13:04
1/5 is 0.2 miles
so 3- 0.2 = 2.8 miles left
now,
No of 0.2 miles in 2.8 miles is 14
cost = 1+ (14*0.2) = 3.8
Answer - (D)
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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5  [#permalink]

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New post 08 Jun 2019, 04:55
If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5 mile there after, then the taxi fare for a 3-mile ride was?

(A) $1.56
(B) $2.40
(C) $3.00
(D) $3.80
(E) $4.20

Solution

convert 1/5 distance = 0.2 (distance) into 5 pieces for a full mile..

1st mile |0.2|....|0.2|...|0.2|....|0.2|...|0.2|
as you can see, first 0.2 is priced at $1, other 4 |0.2| (remaining) are priced at $0.2 each, giving us, 0.2*4 = $0.8 + $1 = $1.8
Next 2 miles can divided into
2nd mile |0.2|....|0.2|...|0.2|....|0.2|...|0.2| ,
3rd mile |0.2|....|0.2|...|0.2|....|0.2|...|0.2|

therefore, their respective price will be 0.2*5 = $1
and
0.2*5= $1

add $1.8+$1+ $1 = $3.8

option D
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If taxi fares were $1.00 for the first 1/5 mile and $0.20 for each 1/5   [#permalink] 08 Jun 2019, 04:55
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