GCSE Secondary Maths Age 13-17 - Number: Cost comparison - Explained

The video tutorial discusses whether Henry should use a water meter or pay a flat rate for his water usage. It explains the costs associated with each option, calculates Henry's annual water usage, and determines the total cost for using a water meter. The tutorial concludes that using a water meter is cheaper than the flat rate. Key points include converting liters to cubic meters, calculating costs in pence and pounds, and comparing the two payment methods.

What are the two payment options Henry is considering for his water usage?

• A flat charge and a pay-as-you-go plan

• A prepaid plan and a pay-as-you-go plan

• A water meter and a prepaid plan

• A water meter and a flat charge

How many liters of water does Henry use annually if he consumes 180 liters daily?

• 1,800 liters

• 18,000 liters

• 657,000 liters

• 65,700 liters

What is the equivalent of 65,700 liters in cubic meters?

• 0.657 cubic meters

• 6.57 cubic meters

• 65.7 cubic meters

• 657 cubic meters

How much does Henry pay per cubic meter of water with a water meter?

• 91.22 pence

• 59.93 pence

• 28.20 pence

• 107.00 pence

What is the total annual cost for Henry using a water meter?

• £107.00

• £28.20

• £88.13

• £59.93

Which payment option is cheaper for Henry based on his water usage?

• Flat charge

• Water meter

• Depends on the season

• Both are the same

What is a key point to remember when calculating costs in this scenario?

• Ignore the fixed charge

• Use a different currency

• Round to the nearest pound

• Always check the units