Rates (Coursebook Part 1)

Mr Chong is paid $25 per hour.

How much will Mr Chong be paid for working 8 hours?

Ans: $____

A wheel makes 30 revolutions per minute.

How many revolutions will the wheel make in 1 hour?

Ans: ____

Water drains form a tank at a rate of 20 litres per minute.

At this rate, how long will it take to drain 100 litres of water from the tank?

Ans ____ minutes

A motorcycle can travel 28 km on 1 litre of petrol.

At this rate, how many litres of petrol will it need to travel 224 km?

Ans: ____ litres

A greeting card machine prints 50 greeting cards in 1 minute.

At this rate, how long will it take to print 3000 greeting cards?

Ans: ____ minutes

A water cooler dispenses 38 ml of water per second.

At this rate, how long will it take to dispense 950 ml of water?

Ans: ____ seconds

Billy's watch gains 20 seconds in 4 days.

How many seconds will Billy's watch again in 1 week?

Ans: ____ seconds

Aini's pulse is 14 beats in 10 seconds.

What is Aini's pulse per minute?

Ans: ____

Mickey saves $72 in 18 days.

He saves the same amount each day.

How many days will Mickey take to save $160?

Ans: ____

A printing machine prints 100 copies in 80 seconds.

At this rate, how many seconds will it take to print 300 copies?

Ans: ____ seconds