boat and movement

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sweety_290581's picture
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Joined: 2006-06-13

There is a race between two boats – A and B on a river; both boats have to travel a distance of 320 km downstream or up stream, irrespective of the other boat. Speed of A is double that of boat B and maximum head start it can give B is 70 hrs and maximum head start boat B can give A is 4hrs.

Q1. What is the speed of boat A?
a. 12 kmph
b. 24 kmph
c. 36 kmph
d. 20 kmph

Q2. What is the speed of stream?
a. 5 kmph
b. 6 kmph
c. 8kmph
d. 2 kmph

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