Question on: WAEC Mathematics - 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 Option: D
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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