Question

A boy takes 4 h to cover certain distance along
the flow and takes 6 h to cover the same distance
opposite to flow. In how much time, he will cross
this distance in still water?
(1) 4.5 h
(2) 5 h
(4) 4.8 h
(3) 24 h​

Answer 1

Answer:

(2) 5 h

This is because (6+4)/2

= 5 which is the speed of the still river