A boat rowed downstream covers 40 km in 4 hours and manages 20 km upstream in 4 hours. Find the baseline speed of the boat in still water. MCQ with Answer and Explanation

Explanation:
Total distance covered = 3 * 8 = 24 km. Total time taken = 8/12 + 8/24 + 8/24 = 2/3 + 1/3 + 1/3 = 4/3 hours. Average speed = 24 / (4/3) = 24 * 3 / 4 = 6 * 3 = 18 km/h.

Explanation:
Downstream speed = 28 / 2 = 14 km/h. Upstream speed = 12 / 2 = 6 km/h. Speed of current = (14 - 6) / 2 = 8 / 2 = 4 km/h.

Explanation:
Since distance is constant, speed is inversely proportional to time. Ratio of times Winner:Runner-up = 50:55 = 10:11. Ratio of speeds Winner:Runner-up = 11:10. Speed excess percentage = ((11 - 10) / 10) * 100 = 10%.