Question

A motor boat covers a certain distance downstream In a river in six hours. It covers the same distance upstream in six hours and half hours.
The speed of water is 1.6km/hr. What is the speed of boat In still water

Answer 1

Answer:

speed of boat=40 km/hr

Step-by-step explanation:

Let speed of boat=x

speed upsream=x-1.6

speed down stream=x+1.6

distance in 6 hrs down stream=6*(x+1.6)=6x+9.6

distance in 6.5 hrs in upstraem=6.5(x-1.6)=6.5x-10.4

as per given

6.5x-10.4=6x+9.6

0.5x=9.6+10.4=20

x=20/05=40 km/hr

speed of boat=40 km/hr