Question

V.
A boy walks to his school at a distance of 6km with constant speed of
2.5km/h and walks back with a constant speed of 4 km/h. his average speed
for round trip expressed in km/h is
a. 24/13
b. 40/13
c. 3
d. 12​

Answer 1

Explanation:

Time for forward journey t1=2.56=512=2.4 hr

Time for backward journey t2 = 46 = 1.5 hr

Average speed =2.4+1.56+6=3.912=1340 km/hr