A vehicle covers a clear run path at an average speed of 50 km/h in 7 hours. At what speed must it travel to wrap up the same path in 5 hours? MCQ with Answer and Explanation

Explanation:
By 5:00 AM, the thief has traveled for 1 hour and covered 45 km. Relative speed = 60 - 45 = 15 km/h. Time taken to catch = 45 / 15 = 3 hours. Capture time = 5:00 AM + 3 hours = 8:00 AM.

Explanation:
Speed = 150 / 3 = 50 km/h. In m/s = 50 * (5/18) = 250 / 18 = 13.88 m/s.

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.