While travelling in a straight line, a car uniformly alters its speed from 50 kilometres per hour to 110 kilometres per hour in 5 seconds.
The acceleration of the car during this time is:
a) 5 kilometres per hour per second
b) 12 kilometres per hour per second
c) 50 kilometres per hour per second
d) 60 kilometres per hour per second
Ans- 12 Kilometres per hour per second