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

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A car is travelling in a constant speed to cover a distance [#permalink] New post 28 May 2012, 10:54
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Question Stats:

87% (01:24) correct 13% (00:17) wrong based on 37 sessions
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?
Senior Manager
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post 28 May 2012, 17:53
"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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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post 29 May 2012, 06:52
'constant speed is the catch'?
then must be D
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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post 29 May 2012, 07:03
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, 07:18
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, 04:28
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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Re: A car is travelling in a constant speed to cover a distance [#permalink] New post 01 Aug 2013, 14:12
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)
Re: A car is travelling in a constant speed to cover a distance   [#permalink] 01 Aug 2013, 14:12
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