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Time and Distance

Discuss Time and Distance within the Quant forums, part of the CAT, XAT, MAT, CET, JMET and other Indian MBA Entrance Exams category; Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many ...

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Time and Distance
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Tarun Bhardwaj
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Time and Distance - July 17th, 2013

Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

A. 9
B. 10
C. 12
D. 20
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Re: Time and Distance - July 18th, 2013

A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?

A. 8 hours
B. 10 hours
C. 12 hours
D. 24 hours



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Re: Time and Distance - July 19th, 2013

Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

A. 9
B. 10
C. 12
D. 20



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Re: Time and Distance - July 21st, 2013

If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:

A. 50 km
B. 56 km
C. 70 km
D. 80 km



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Rohit Patil
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Re: Time and Distance - October 2nd, 2013

last answer is 50kmph
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Re: Time and Distance - January 11th, 2016

A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 18 seconds. What is the length of the platform in meters?
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Re: Time and Distance - January 11th, 2016

A train traveling at 100 kmph overtakes a motorbike traveling at 64 kmph in 40 seconds. What is the length of the train in meters?
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Re: Time and Distance - January 11th, 2016

Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed.
What is the average speed of Jim's travel in mph?
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Re: Time and Distance - January 11th, 2016

A man can row 50 km upstream and 72 km downstream in 9 hours. He can also row 70 km upstream and 90 km downstream in 12 hours. Find the rate of current.
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Re: Time and Distance - January 11th, 2016

Quote:
Originally Posted by jitenmazee View Post
A man can row 50 km upstream and 72 km downstream in 9 hours. He can also row 70 km upstream and 90 km downstream in 12 hours. Find the rate of current.
Correct Answer is 4 kmph

Explanatory Answer

Let x and y be the upstream and downstream speed respectively.

Hence, 50/x + 72/y = 9 and 70/x + 90/y = 12
Solving for x and y we get x = 10 km/hr and y = 18 km/hr

We know that Speed of the stream = 1/2 * (downstream speed - upstream speed)
= 1/2 (18 - 10) = 4 km/hr.
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