Question

A man can row a boat 18 km downstream and return upstream to the origional point is 5 hours 36
minutes. If the speed of stream is 2 km/h. Find the speed of boat in still water.

Answer 1

Answer:

60km/hr

Step-by-step explanation:

Lets assume the speed of boat to be x and it is given that the speed of stream is 2km/hr and distance/speed=time and distance is 18km.

Now,

time= 5.06 hrs

distance = 18km

speed, upstream is x+2

speed, downstream is x-2

18/x+2 + 18/x-2 = 5.06

simplify, you will get x= 60km/hr that is speed of boat in still water