Question

For 2.5 cm thick c.c. floor of 1:2:4 proportion, for 100 sq m, how many cement bags will be required?

(a) 18

(b) 28

(c) 24

(d) 10

I have been asked this question in an internship interview.

I need to ask this question from Analysis of Rates of Cement Concrete in chapter Analysis of Rates of Civil Engineering Drawing

Answer 1

The correct choice is (c) 24

Easiest explanation: 100 sq m total dry volume of materials = 2.75+50% = 2.75+1.375 = 4.125 cu m. Therefore, cement = (4.125) / (1+2+4) = .59 cu m = .60 cu m (18 bags). For neat cement surface finishing additional 0.2 cu m (6 bags) of cement will be required.