# Math

posted by Z

This task is about choosing a new washing machine.

Your washing machine is broken. You need a new one. The new washing machine must hold at least as much as the old one and spin at least as fast as the old one.

You used your old washing machine three times a week.

Details of your old washing machine : Washes up to 6kg at a time
Spin speed - 1200

New washing machines for sale (with 5 year guarantee

Washing Machine
Aqua - £299 - 5.5kg - 1200 - unit of electricity for each wash: 0.9
Litres of water used for each wash: 42

Bubble - £399 - 6kg - 1600 - 1.2 - 45

Eco - £259 - 6kg - 1000 - 0.9 - 44

Optus - £329 - 7kg - 1400 - 1.3 - 50

Swirl - £329 - 6kg - 1100 - 1.1 - 49

Costs to use a washing machine
Electricity costs - £0.12 per unit
Water costs - £0.003 per litre

1. Bubble

i don't know pal

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