Question

A Car
travels 30 km at a Speed of to
40 km/h
and
next 30km at a Speed of
20 km/h find its average speed
a) 26.7 km/h
b)38 .9 km/h
c) 48.9 km/h d) 59.7 km/h.​

Answer 1

a) 26.7 km/hr

Step-by-step explanation:

Average speed. = total distance /total time

Total distance = 30+30 = 60 km

Time = distance / speed

Total time = 30/40+30/20

Total time = 30+60/40

Total time = 9/4

Avg speed = 60/9/4

Avg speed = 26.66 km/hr

Option a is the answer