Question

A boat run in upstream 24km and down stream 36km in 6 hours at the aboat run upsteam 36 km and down stream 24 km in 6.30 minutes find the strean speed

Answer 1

let the time taken in going 12km upstream = time taken in going 36km downstream = t

=> speed of boat in upstream = 12/t

=>speed of boat in downstream = 36/t

=> time taken in going 16km upstream = 16/(12/t)

=>time taken in going 24km downstream = 24/(36/t)

=>total time taken in 16km upstream and 24km downstream

    =16/(12/t)+24/(36/t)=6 hours

by solving the equation

 t=3

so speed of boat upstream = 4km/h

and speed of boat downstream = 12km/h

let velocity of boat in still water = v

let speed of stream = b

-> v-b = 4

 v+b=12

=> v=8 and b=4

velocity of boat in still water = v =8km/h

and speed of stream =b= 4km/h

HOPE IT HELPS

PLS MARK BRAINLIEST