A boat can row 14 km/h in still water and the speed of the current is 2 km/h. Find the time taken to row 36 km upstream. MCQ with Answer and Explanation

Explanation:
Required speed = Distance / Time = 150 / 2 = 75 km/h.

Explanation:
Time taken to cross the platform distance alone = 20 - 8 = 12 seconds. Speed of the train = 240 / 12 = 20 m/s. Length of the train = Speed * Time to pass the person = 20 * 8 = 160 meters.

Explanation:
Upstream speed = 24 / 4 = 6 km/h. Downstream speed = 36 / 4 = 9 km/h. Current speed = (Downstream speed - Upstream speed) / 2 = (9 - 6) / 2 = 1.5 km/h.