A man completed a certain journey by a car. If he covered 30% of the…

Question

A man completed a certain journey by a car. If he covered 30% of the distance at the speed of 20 km/hr, 60% of the distance at 40 km/hr and the remaining distance at 10 km/hr, his average speed for the whole journey was…

Accepted Answer

Option A. 25 km/hr. Answer & Solution Answer: Option A Solution: Let 10% of journey's = 40 km Then, total journey = 400 kms And, Average speed = Total distance Total time & 30\% of journey = 400 × 30100 & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 120 km & 60\%…

A man completed a certain journey by a car. If he covered 30% of the distance at the speed of 20 km/hr, 60% of the distance at 40 km/hr and the remaining distance at 10 km/hr, his average speed for the whole journey was :

Solution