Question

A boat has a speed of 5 kmph in still water. It crosses a river of width liom along the shoes possible path in 15min.then the velocity of the river and direction of boat is​

Answer 1

Step-by-step explanation:

Shortest possible path,s=1km

Time taken, t=15min=0.25hr

Speed in the direction of shortest path,

t

s

=

v

2

−u

2

Where, v=5kmh

−1

velocity of boat, u velocity of river.

t

s

=

v

2

−u

2

0.25

1

=

5

2

−u

2

u=3kmh

−1

Hence, velocity of river is 3kmh

−1

Hope this helps you