A car covers 4 successive 3km stretches at speed of 10kmph, 20kmph, 30kmph & 60kmph resp. Its average speed is? A. 20kmph. B. 30kmph. C. 25kmph. D. 27kmph. Answer Workspace Report Discuss Answer with explanation Answer: Option A Explanation Average speed = total distance / total time total distance = 4 * 3 = 12 km total time = `3/10 + 3/20 + 3/30 + 3/60` = `36/60` hr speed =`12/(36 / 60)` = 20 kmph Workspace
Discuss about the question