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Mathematics

If a car can go 224 km in 20 litres of petrol, how far can it go in 32.5 litres of petrol?

  1. 364 km
  2. 414 km
  3. 288 km
  4. 298 km

Unitary Method

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Answer

Distance on 20 L = 224 km

Distance on 1 L = 22420 km[Less petrol, Less distance]\dfrac{224}{20} \text{ km} \quad \text{[Less petrol, Less distance]}

Distance on 32.5 L = (22420×32.5) km[More petrol, More distance]\Big(\dfrac{224}{20} \times 32.5\Big) \text{ km} \quad \text{[More petrol, More distance]}

= 11.2 x 32.5 km \quad [Dividing 224 and 20 by 20]

= 364 km

Hence, option 1 is the correct option.

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