Speed of boat is 32km/h and 48km/h in upstream and downstream respectively. Find the time taken by boat to cover a distance of 880 km in still water?

Correct option is A

Let the speed of boat in still water be a and the speed of the stream be y
ATQ,
a – y = 32 ……….(1)
a + y = 48 ………..(2)
From (1) and (2)
a = 40 km/hr.
Required time = 880/40=22