Question

A man can row with the stream at the rate of 20 kmph and against the stream at 5 kmph. The man's rate in still water isSelect one:
a. 12.5 kmph
b. 15.5 kmph
c. 7.5 kmph
d. 17.5 kmph

Answer 1

Answer:

12.5kmph

Step-by-step explanation:

I guess it so if wrong sorry and if right welcome

Answer 2

a. 12.5 kmph

Step-by-step explanation:

OA is B=12.5 km/h

B is boat speed

S is stream speed

B+S=20----(1)

B-S=5-----(2)

Equating both

2B = 25

B=12.5

So speed of boat in still water is 12.5