Question

A calculator may be used for this question. The energy saving from recycling one glass bottle will power the oven Adam uses to cook the turkey for 7.5 minutes. Glass used for recycling costs 5p per kg. A glass bottle weighs 500 grams. How much would the recycled glass cost to power the oven for 6 hours?

Answer 1

6 hours=360 minutes
Glass bottles needed to cook for 6 hours=360/7.5
                                                           =48
Weight of 48 glass bottles=48x500g
                                      =24000g
                                      =24kg
Price of 24kg of glass=5px24
                               =120p