Quandaries and Queries


When a car is driven 'normally' the feul consumption is 7.5 per litres per 100km. On a particular journey the car was driven in 'hard' and the consumption changed to 9.1 litres per 100km. Fuel cost 80p per litre. Calculate:

a) The extra feul consumed.
b) The extra cost of feul, in pounds, for the journey when the car was driven in 'hard'.




Hi Guy,

Driving hard uses 9.1 litres per 100 km while normal dirving uses 7.5 litres per 100 km.

9.1 - 7.5 = 1.6 and hence driving hard uses an extra 1.6 litres of fuel for each 100 km.

You didn't tell me how how far the journey was so I can't calculate the extra fuel consumed.


Go to Math Central