Math and Physics Problems

Front

A plumber charges £35 per hour plus a £25 call-out fee. How much does he charge for a 4-hour job?

Back

£165

Front

A delivery driver earns £8.50 per hour for the first 40 hours and £12.75 per hour for overtime. How much does she earn for working 45 hours?

Back

£403.75

Front

A carpenter's rate is £28 per hour. If he works 6.5 hours, how much does he earn?

Back

£182

Front

A cleaner charges £15 per hour and works for 3 hours 45 minutes. How much should she be paid?

Back

£56.25

Front

An electrician charges £45 per hour with a minimum charge of 2 hours. What is the cost for a 1.5-hour job?

Back

£90

Front

A block of wood has a mass of 850g and a volume of 500 cm³. Calculate its density in g/cm³.

Back

1.7 g/cm³

Front

A piece of metal has a density of 7.8 g/cm³ and a volume of 250 cm³. Calculate its mass in kg.

Back

1.95 kg

Front

A liquid has a density of 0.85 g/cm³ and a mass of 680g. Calculate its volume in litres.

Back

0.8 litres

Front

Convert 2.5 kg/m³ to g/cm³.

Back

0.0025 g/cm³

Front

A cube of aluminium has sides of 4 cm and a density of 2.7 g/cm³. Calculate its mass.

Back

172.8 g