Question

3. A car run along the sides of a square groun
with the speed of 20 km./hr., 30 km./hr., 40
km./hr. and 60 km./hr. respectively. Accord-
ingly, what is the average speed of car along
the sides of ground?​

Answer 1

Answer:

$(20 + 30 + 40 + 60 ) \div 4 =37.5$