Question

For 100 sq. m cement concrete (1 : 2: 4) 4 cm thick floor, the quantity of cement required, is ________

(a) 0.90 m^3

(b) 0.94 m^3

(c) 0.98 m^3

(d) 0.98 m^3

Answer 1

Correct answer is (b) 0.94 m^3

The best explanation: Volume – area * thickness.

So, 100*.04 = 4 cubic metre, 10% for uneven surface.

4 * 10% = .04 = 4.4cubic metre.

50% for dry mortar, 4.4 * 50% = 2.2.

= 6.6cubic meter.

Cement = 6.6/(1 + 2 + 4) = .94 cubic meter.