Question

("uLUNU llaveleu by the bus.
b) A train travels the first 30km of 120km track with a uniform speed of 30km/h. What
should be the speed of train to cover the remaining distance of the track so that its
average speed is 60km/h for the trip.​

Answer 1

Explanation:

Speed of the train in the first 30 km, v1 = 30 km/h Speed of the train in the next 90 km, v2 (to be determined) Average speed = 60 km/h = (v1 + v2)/2 = (30 km/h + v2)/2 ⇒ v2 = 90 km/h