1

### IIT-JEE 1988

A boat which has a speed of 5 km/hr in still water crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water in km/hr is
A
1
B
3
C
4
D
$\sqrt {41}$
2

### IIT-JEE 1983

A river is flowing from west to east at a speed of 5 meters per minute. A man on the south bank of the river, capable of swimming at 10 meters per minute in still water, wants to swim across the river in the shortest time. He should swim in a direction
A
due north
B
$30^\circ$ east of north
C
$30^\circ$ west of north
D
$60^\circ$ east of north

On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
IIT-JEE 2012 (2)
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IIT-JEE 2008 (1)
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IIT-JEE 2004 Screening (2)
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IIT-JEE 1988 (1)
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IIT-JEE 1983 (1)
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