Question

a man while driving to school computes the average speed for his trip to be 20 km per hour on his return trip along the same route that is less traffic and the average speed is 40 kilometre per hour the average speed for his trip is​

Answer 1

Answer:

average speed is

30.

jj

Answer 2

Answer:48km/h

Explanation:

Let distance =x km

D1=x km

S1=60 km/h

T1=x/60 h

D1=x km

S2=40 km/h

T2=x/40 h

Total distance =x+x

=2x

Total time=x/60+x/40

=5x/120

=x/24

So, average speed=2x÷x/24

=2×24

=48km/h

Thanks