The speed of the boat in still water is 5 times the speed of the current . It takes 1.1 hours to row to point B from point A downstream . The distance between point A and point B is 13.2 km . How much distance will it cover in 312 minutes upstream ?

Options

A. 43.2 km
B. 48 km
C. 41.6 km
D. 44.8 km

Answer

C

Explanation

Let the speed of current be x .
Then , speed of boat be 5 x .
Total speed in downstream = x + 5x = 6x
Total speed in upstream = 5x - x = 4 x = 8km

`1.1 xx 6 x = 13.2 implies x = 2`
Required Distance covered = Time `xx` Speed
`= (25)/(6) xx 8 = 52 xx 8 = 41.6` km