Distance between two stations A and B is 778 km. A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56 km per hour. Find the average speed of the train during the whole journey.
(a) 67.2 km/hr. (b) 67.8 km/hr. (c) 65.7 km/hr. (d) 66.2 km/hr
Question ID - 51419 | SaraNextGen Top Answer Distance between two stations A and B is 778 km. A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56 km per hour. Find the average speed of the train during the whole journey.
(a) 67.2 km/hr. (b) 67.8 km/hr. (c) 65.7 km/hr. (d) 66.2 km/hr
Distance between two stations A and B is 778 km. A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56 km per hour. Find the average speed of the train during the whole journey.
(a) 67.2 km/hr. (b) 67.8 km/hr. (c) 65.7 km/hr. (d) 66.2 km/hr
1 Answer
127 votes
Answer Key / Explanation : (a) -
Required average speed = 
km/hr = 
km/hr = 67.2 km/hr.
127 votes
Answer Link
127