Question

Rahul while going to market computes the average speed for his trip to be 45km/hr. On his return trip along the same trip there is less traffic and the average speed is 60km/hr. What is the average speed of Rahul's trip?​

Answer 1

Explanation:

average speed

total distance /time taken

let distance =s

(s+s)km/(s/45+s/60)

=2s km/(s/15)h

=15 × 2=30km/h