Liam is a tyre fitter it takes him 56 minutes to fit 4 tyres to a van how long would it take to fit 12 tyres to 3 vans

168 minutes, or 2 hours, 48 minutes

Step-by-step explanation:

Set up a proportion and solve.

56 minutes is to 4 tires as 'x' minutes are to 12 tires

becomes

56/4 = x/12 solve for x ...

[56 (12) ]/4 = x (multiply both sides by 12 to get rid of the fraction)

672/4 = x (simplify 52 (12) = 672)

168 = x (simplify 672/4 = 168)