Question

A train travels with a speed of 60 km per hour to station a to b and then comes back in speed 80 kilometre per hour from station b to a .find average speed​

Answer 1

Explanation:

Ans is abv

Any other doubts??

Answer 2

Answer:

solved

Explanation:

let distance ab = d km.

time t1 =  d/60 hours

time t2=  d/80  hours

total time = 14d/480 = 7d/240

average speed​ = 2d ÷7d/240 = 480/7 = 68.6 km/h

average velocity = 60 +80 ÷ 2 = 70 km/h