Question

A man covers a distance of 40km. He covers
first 10 km at 10km/h, second 10 km at
20km/h, third 10 km at 30km/h and last
10km at 40km/h. What is the average speed of
man?
(a) 18.2 km/h
(b) 19.2 km/h
(c) 19.0 km/h
(d) 16.2 km/h​

Answer 1

Answer:

19.2 km per hour

hope it's helpful