Explanation:Initial speed = 80km/hr
|C.||15km/hr||D.||None of these|
Explanation:Difference between speeds of car A and car B = 60/3 = 20km/hr
Explanation:Walking at 3/4th of usual rate implies that time taken would be 4/3th of the usual time. In other words, the time taken is 1/3rd more than his usual time
Explanation:net height climbed in 2 min = 20m - 4m = 16m
Explanation:Since the car runs at 7/11 th of its own speed, the time it take is 11/7th of its usual speed.