The speed of boat in still water is 25km/hr. and the speed of current is 7km/hr. if a boat goes from place P to place Q and return from Q to P and it takes 7 h ours 5 minutes in total. Find the time taken by boat to cover double the one third of distance of PQ in downstream?
(a) 2hr 42minute
(b) 1hr 42minute
(c) 2hr 47minute
(d) 1hr 47minute
Sol:
