Question

[5×1=5]

1. A car increases its speed with uniform rate from 20 km/h to 50 km/h in 10 seconds, average speed of car is [1]

(1) 35 km/h

(2) 40 km/h

(3) 45 km/h

(4) 30 km/h
​

Answer 1

Explanation:

rate of change in speed is 30km/h so that the average speed of the car

Answer 2

Explanation:

rate of change of speed is 30km/h