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A car is travelling in a constant speed to cover a distance

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karthiksms
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A car is travelling in a constant speed to cover a distance [#permalink] New post   28 May 2012, 11:54
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A car is travelling in a constant speed to cover a distance of 100 miles. What is the time taken to cover the distance?

(1) In the last 10 miles, car was travelling at a speed of 23 miles/hr
(2) In the first 40 miles, car was travelling at a speed of 23 miles/hr

What could be the answer for this DS question?

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piyatiwari
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post   28 May 2012, 18:53
"car is travelling in a constant speed". So you need car's speed to find 'time taken to cover 100 miles'

Each statement is sufficient.

Answer is D.
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kashishh
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post   29 May 2012, 07:52
'constant speed is the catch'?
then must be D
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ronr34
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post   29 May 2012, 08:03
did you see the catch before looking at the answers or did it stand out
just after trying to use the answers to solve?
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post   29 May 2012, 08:18
OA is please. Answer should be D
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post   01 Jun 2012, 05:28
karthiksms wrote:
A car is travelling in a constant speed to cover a distance of 100 miles. What is the time taken to cover the distance?

(1) In the last 10 miles, car was travelling at a speed of 23 miles/hr
(2) In the first 40 miles, car was travelling at a speed of 23 miles/hr

What could be the answer for this DS question?


OA please.

I am getting D

CONSTANT SPEED.
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WholeLottaLove
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post   01 Aug 2013, 15:12
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A car is traveling in a constant speed to cover a distance of 100 miles. What is the time taken to cover the distance?

Time = Distance/Rate
Rate = Distance/Time

(1) In the last 10 miles, car was travelling at a speed of 23 miles/hr

Rate = Distance/Time
Rate = 10/23
Rate = .43 miles/minute

If the car was traveling at a constant rate then this rate is applicable for the entire trip.

Time = Distance/Rate
Time = 100/0.43
Time = 232 minutes
Time = 3.87 hours
SUFFICIENT

(2) In the first 40 miles, car was travelling at a speed of 23 miles/hr
The car is going at a constant rate of 23 miles/hour. Therefore:
Time = Distance/Rate
Time = 100/23
Time = 4.34 hours
SUFFICIENT

(D)

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Re: A car is travelling in a constant speed to cover a distance [#permalink]
01 Aug 2013, 15:12
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