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)?

16 kmph

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