Question

A motor boat goes downhill at a speed v+x where x is the speed of stream and v is the speed of boat in still water.If it covers 100m in 10 seconds,find v+x. The same motor boat goes uphill the same distance(100m) in 15 seconds.Find the speed of the boat uphill. FIND v AND x.

Answer 1

Answer:

10=100/(v+x)

v+x=10

15=100/(v-x)

v-x=100/15=20/3

(v+x)+(v-x)=10+20/3=16.7

2v=16.7

v=8.35

x=10-v=10-8.35=1.65