Question

Exam Questions

3
Elijah runs a go-kart track. It takes 12 litres of petrol to our
race 8 go-karts for 20 minutes. Petrol costs £1.37 per litre.
a) 6 go-karts used 18 litres of petrol. How many minutes did they race for?

Answer 1

17.78 minutes

Explanation:

Given that;

It takes 12 liters of petrol to our to race 8 go-karts for 20 minutes at a costs of £1.37 per liter, form a table as;

Liters of petrol go-kart races minutes cost per minute

12 8 20 1.37

18 6 ? 1.37

Perform cross-product as;

=12*8*20*1.37)/18*6*1.37

=2630.4/147.96

=17.78 minutes