A car covers a certain distance at an average speed of 60 km/h in 4 hours. At what speed must it travel to cover the same distance in 3 hours? MCQ with Answer and Explanation

Explanation:
Time = 5 minutes = 300 seconds. Speed = 600 / 300 = 2 m/s. Speed in km/h = 2 * (18/5) = 36 / 5 = 7.2 km/h.

Explanation:
Relative speed = 36 - 30 = 6 km/h = 5/3 m/s. Time required for capture = 150 / (5/3) = 90 seconds. Distance run by fox = Speed * Time = [30 * (5/18)] * 90 = (25/3) * 90 = 750 meters.

Explanation:
Let original speed be s. 480 / (s - 10) - 480 / s = 2 => 240 / (s - 10) - 240 / s = 1 => 2400 = s(s - 10). Solving s^2 - 10s - 2400 = 0 gives (s - 50)(s + 40) = 0. Baseline speed = 50 km/h.