MCQ Practice

A man can row 30 km downstream and 20 km upstream in 4 hours. He can row 45 km downstream and 40 km upstream in 7 hours. Find the speed of man in still water?

Subject: MathematicsTopic: Basic Maths
A

15 kmph

B

10 kmph

C

12 kmph

D

12.5 kmph E. None of these

Correct Answer: D