Question

A boat travels 30 km upstream. In the same period of time it takes to travel 50 km downstream. If the
speed of water is 5km/hr, what is the speed of boat in still water?​

Answer 1

Answer:

Speed of boat in still water=20km/hr

Step-by-step explanation:

let the speed of boat be (x-5) in upstream and (x+5) in downstream

s=d/t ,t= d/s

30/5= 6hours

50/5= 10hours

then the equation will be

6(x+5)=10(x-5)

6x+30=10x-50

+30+50=10x-6x

80=4x

x=80/4

=20 km/hr

Hope it helps...