Question

A boat covers a round trip journey between two points in a river. The points are 157.5 km apart. The time taken for the upstream ſoumey is 7 hours more than
the time taken for the downstream journey. If the speed of the water in the river is 3 km/h, then the total time (in hours) taken by the boat for a journey of 45
km upstream and 39 km downstream is?

a) 33/5
b) 32/5
c) 38/5
d) 26/5

Answer 1

Answer:

A boat travels with a speed of 15 km/hr in still water. If a river flowing at 5 km/hr, the boat travels some distance downstream and then returns. The ratio of average speed to the speed in still water is