Aman can go downstream thrice as fast as he can go upstream between two specific points on a river. If the river flows at 8 kmph, what is the speed of the boat in still water (in kmph)?
Answer & explanation
Correct answer: option 3
Assume boat's velocity in still water be "x"
Velocity of River = 8
Downstream velocity, D = x + 8
Upstream velocity, U = x - 8
Given, D = 3U
x+8 = 3(x-8)
x+8 = 3x - 24
2x = 32
x = 16
The correct answer is Option (3) → 16 kmph