Question

Rahim, while driving to school, computes the
average speed for his trip to be 20 km h 1. On his
return trip along the same route, there is less traffic
and the average speed is 30 km h 1. What is the
average speed for Rahim's trip

Answer 1

$average \: speed \: = total \: distance \\ travelled \: \div time \: taken$
30 +20/1+1
50/2 = 25 km per hour