A company is to construct a parking bay whose area is 135m². It is to be covered with a concrete slab of uniform thickness of 150mm....

A company is to construct a parking bay whose area is 135m². It is to be covered with a concrete slab of uniform
thickness of 150mm. To make the slab, cement, ballast and sand are to be mixed so that their masses are in the ratio 1 :4 : 4. The mass of 1m³ of dry slab is 2500kg. Calculate
a) i) the volume of the slab.
ii) the mass of the dry slab.
iii) the mass of cement to be used.
b) If one bag of cement is 50kg, find the number of bags to be purchased.
c) If a lorry carries 7 tonnes of sand, calculate the number of lorries of sand to be purchased.

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sharon kalunda answered the question on May 3, 2019 at 06:50

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