Home
Class 11
PHYSICS
A person can swim in still water at 5 m/...

A person can swim in still water at `5 m//s`.He moves in a river of velocity `3 m//s`, first down the steam and next same distance up the stream. The ratio of times taken are

A

`1:1`

B

`1:2`

C

`1:4`

D

`4:1`

Text Solution

Verified by Experts

The correct Answer is:
C
`t_(1) =(d)/(v+u) and t_(2) =(d)/(v-u)`
Promotional Banner

Similar Questions

Explore conceptually related problems

A boy can swim in still water at 1m//s . He swims across a river flowing at 0.6m/s which is 336 m wide. If the travels in shortest possible time, then what time he takes to cross the river?

The velocity of a boat in still water is 10 m//s .If water flows in the river with a velocity of 6 m//s what is the difference in times taken to cross the river in the shortest path and the shortest time.The width of the river is 80 m .

A man can swim in still water at 4m//s river is flowing at 2m//s . the angle with downstream at which he should swim to cross the river minimum drift is

A swimmer can swim in still water with speed v and the river is flowing with velociyt v//2 . To cross the river in shortest distance, he should swim making angle theta with the upstream. What is the ratio of the time taken to swim across the shortest time to that is swimming across over shortest distance

The speed of a swimmer in still water is 20 m//s. The speed of river water of river water is 10 m//s and due east. If he is standing on the south bank and wishes to cross the river along the shortest path the angle at which he should make his stroke w.r.t. noth is given by :-

A swimmer can swim in still water with speed v and the river is flowing with speed v//2 . What is the ratio of the time taken to swimming across the river in shortest time to that of swimming across the river over the shortest distance ?

Velocity of boat in still water is 13 m/s. If water flows ina river with a velocity of 5 m/s. What is the difference in times taken by him to cross the river in the shortest path and in the shortest time. If the width of the river is 10 m.

A river 500m wide is flowing at a rate of 4 m//s. A boat is sailing at a velocity of 10 m//s with respect to the water, in a direction perpendicular to the river. The time taken by the boat to reach the opposite bank