Question

A motorboat travels 10km downstream in 50 minutes and returns in 1 hour. What is the speed of the motorboat in still water?​

Answer 1

Answer:

Distance travelled in water=10km

time=50minutes

speed d/t

speed=10×1000/150×60

Speed=10000/9000

Speed=1.11m/s

Answer 2

Answer:

11 km/hr

Step-by-step explanation:

speed = distance/time

speed in upstream = 10/1 = 10km/hr

speed in downstream = 10/50/60 = 10×60/50

= 60/5 = 12km/hr

speed in still water = 1/2( speed in downstream + speed in upstream )

= 1/2(12+10)

1/2 × 22

= 11

speed in still water is 11km/hr

Hope It helps :)