a car moves through 20km at a speed of 40km/hr,and the next 20km at a speed of 60km/hr calculate its - Science - Motion

Question

a car moves through 20km at a speed of 40km/hr,and the next 20km
at a speed of 60km/hr calculate its average speed

Somnath physics · Accepted Answer

Here, total distance covered is =
20 + 20 = 40 km

The first 20 km it travels at 40
km/h, the time taken is = 20/40 = 1/2 h

Next 20 km it travels at 60 km/h,
the time taken is = 20/60 = 1/3 h

So, average speed is = total
distance/total time = (40)/(1/2 + 1/3) = (40 Ã— 6)/(5)
= 48 km/h

a car moves through 20km at a speed of 40km/hr,and the next 20km at a speed of 60km/hr.calculate its average speed