Question

5. A car travels at a speed of 80 km/h during the first half of its running time a
40 km/h during the other half. Find the average speed of the car. (60 km/h) (AS
ntant cool​

Answer 1

Answer:

60km/hr

Explanation:

Let the each half of the running time be t.

During first half time ,speed of car=80km/hr

Distance covered d1 =80t km

During 2nd half time, speed of car=40km/hr

Distance covered d2= 40t km

total distance coverd d=d1+d2 =80t+40t =120 t

Total time taken =T=2t

average speed =dt =120/2t =60 km/hr