Thursday, January 19, 2012

Comparing LPG with cars that use petrol?

If u wanted to compare the furl efficiency of cars that use LPG with that of cars that use petrol, how would you design a fair test ( that is one with as many 'controls' as possible) ?Comparing LPG with cars that use petrol?
all you can do is compare mileage with cost
  • p411
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