John pours 96 litres of red oil into a rectangular container with length 220cm and...

WAEC 2011

John pours 96 litres of red oil into a rectangular container with length 220cm and breadth 40cm. Calculate, correct to the nearest cm, the height of the oil in the container

A. 11cm
B. 18cm
C. 21cm
D. 34cm

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Correct Answer: Option A

Explanation

volume of rectangular container = L x B x H

1 litre = 1000cm³

96 litres = \(\frac{1000cm^3}{1 litres}\) x 96 litres

volume = 96000cm³

96000 = 220 x 40 x 11

96--- = 8800H

H = \(\frac{96000}{8800}\)

= 10.97cm

= 11cm

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