Question

A boat which has speed of 5km/h in still. water crosses a rives of width 1 km
along shortest possible path in 15 min Find velocity of river water. ​

Answer 1

Answer:

$\huge\pink{\tt Hey\:Mate}$

The width of river = 1 Km

Boat crosses river in = 15 min

$\large{\tt Resultant\:Velocity\:of\:boat = \frac{1km}{0.25h}=4km/h}$

$\large{\tt Velocity\:of\:river={\sqrt{25-16}}}$

$\large\red{\boxed{\tt Velocity\:of\:river = 3km/h}}$

Hope this will help uh!!

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Answer 2

Given

Speed of boat in steel was = 5km/hr

width of river = 1km

time taken by boat = 15min = 1/4hr

so Speed of boat = 1/1/4 = 4km/hr

velocity of water = 5km/hr - 4km/hr= 1km/hr