Question

A car is travelling with a speed of 45 kmph for 20
minutes & 60kmph for 15 min calculate the average
speed of the car?​

Answer 1

Answer:

Explanation:Car travels at a speed of 80km/hour for 15 minutes

We know Distance = speed × time

Distance travelled in 15 minutes or 0.25 hour

Distance = 80 km/h × 0.25 hour = 20 kilometers

and then at a speed of 40km/hour for the next 15 minutes.

Distance travelled in next 15 minutes or 0.25 hour

Distance = 40 km/hour × 0.25 hour

Distance = 10 kilometers

Now average speed of car = total distance travelled / total time

Average speed = (20 km + 10 km)/ (0.25 + 0.25) hours

Average speed = 30/0.50 kilometer/hour

Average speed = 60 kilometers/hour