Question

Abdul, 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
40 km h–1. What is the average speed for Abdul’s trip?

Answer 1

Answer:

solution

going speed of Abdul to school (s1)=20km/hr

coming speed of Abdul to home (s2) = 40km/hr )

then,

we know

average speed for Abdul trip(s)= (s1+s2)/2

=(20+40)/2

=30 km h-1

Explanation:

average speed = 1st speed +last speed then divided them by 2

simply we can understand from average fo formula