MATH F.1

1.A bus travelled 300km in 5 hours

(a) If the average speed of the bus increases by 5 km/h, find the distance to be travelled by the bus in 1.5 hours.

(b) If the average speed of the bus reduces by 10m/s, find the distance to be travelled by the bus in 45 minutes.

how to do? and 點解？