Question

40. If a person goes from town A to town B by a speed
of 50 km/h and comes back with a speed of
150 km/h then average speed of the person is
(1) 100 km/h
(2) 75 km/h
(3) 0 km/h
(4) 200 km/h​

Answer 1

Answer:

(2)

Explanation:

round trip distance 2d

write time in terms of d

apply formula for avg. speed= total distance./total time