Question

on a journey of 80 kilometre A car covers the first 40 km with a uniform speed of 80 km/hour how fast it should travel in the next 40 kilometres so that an average speed of 100 kilometre/hour is maintained for the entire journey​

Answer 1

Explanation:

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Answer 2

Answer:

Explanation:

The total distance travelled is 80 km.

Half distance (40 km) is travelled at 80 km/h and the remaining half distance (40km) is travelled at 40 km/h.

Time used:

Formula : t=d/v

t=40/80=0.5 hour or 1/2 hour

t=40/40=1 hour

Total time taken = 1.5 hour

Now,

Speed = distance/time = 80/1.5 = 53.33 km/h

Answer : 53.33 km/h