A person can row downstream 20 km in 2 hours and upstream 4 km in 2 hours. Find man’s speed of rowing is still water and the speed of the current.

Question

( A ) Speed of the man = 8km/hr, speed of the current =7km/hr
( B ) Speed of the man = 6km/hr, speed of the current =4km/hr
( C ) Speed of the man = 6km/hr, speed of the current =7km/hr
( D ) Speed of the man = 10km/hr, speed of the current =4km/hr