A person row a boat 24 km upstream in 4 hours. If the speed of the current is 2 km/h, find the speed of the boat in still water. MCQ with Answer and Explanation

Explanation:
Time = 5 minutes = 300 seconds. Speed = 600 / 300 = 2 m/s. In km/h = 2 * (18/5) = 7.2 km/h.

Explanation:
Downstream speed = 1 km / (5/60 hours) = 12 km/h. Upstream speed = 1 km / (12/60 hours) = 5 km/h. Speed of stream = (Downstream speed - Upstream speed) / 2 = (12 - 5) / 2 = 3.5 km/h.

Explanation:
Speed of train = 72 * (5/18) = 20 m/s. Total distance to cross platform = 150 + 250 = 400 meters. Time taken = 400 / 20 = 20 seconds.