Question

(f) A boy goes from his house to school by bus
at a speed of 20 km h-1 and returns back
through the same route at a speed of
30 km h-1. The average speed of his
journey is :​

Answer 1

Answer:

d¹ = 20km

t¹ = 1 hour

d² = 30km

t² = 1 hour

average speed= total distance traveled/ total time taken

average speed = 20+ 30/ 1+1

= 40/2

= 20 km/ h