Multiple choice

A man can row the boat in still water with the speed of 12 km/hr. If the speed of the stream is 4 km/hr, then to travel a certain distance time taken along upstream is 6 hours more than downstream. Find that distance.

  1. 128 km

  2. 96 km

  3. 112km

  4. 80 km

  5. 144 km

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Upstream speed = 12 - 4 = 8 km/hr, downstream speed = 12 + 4 = 16 km/hr. Let distance be d. Then d/8 = d/16 + 6. Solving: multiply by 16 to get 2d = d + 96, so d = 96 km. This matches option B.