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A car uses one litre of petrol for every 14km. If one of petrol cost...

Mathematics
WAEC 2010

A car uses one litre of petrol for every 14km. If one of petrol cost N63.00, how far can the car go with N900.00 worth of petrol?
  • A. 420km
  • B. 405km
  • C. 210km
  • D. 200km
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Correct Answer: Option D
Explanation
1 litre = N63.00

xlitres = N900.00

x x N63 = N900 x 1 litre

x = \(\frac{900}{63} \times litre\)

x = \(\frac{100}{7}\) litres

Also, 1 litre = 14km

\(\frac{100}{7}\) = y

y x 1 litre = \(\frac{100litre}{7}\) x 14km

y = 20km

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