A dump truck runs 54 km on 12 liters of fuel. How many kilometres will it run on 60 liters of fuel?
270
At a constant rate of fuel use, the distance covered is directly proportional to the fuel used, so distance ÷ fuel stays fixed.
Distance per litre = 54 ÷ 12 = 4.5 km.
Distance on 60 litres = 4.5 × 60 = 270 km.
Check: 60 litres is 5 times 12 litres, and 5 × 54 = 270 km, which agrees.
Hence, 270.
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