Question

4 bags of cement do 18m2, how many m2 can be done with 7 bags?

Answer 1

You would get 31.5 square meters.

Explanation:

To find this, set up a proportion of the amount the first can make and the amount the second can. Use x for the unknown quantity.

4/18 = 7/x

Now cross multiply to solve.

7*18 = 4*x

126 = 4x

31.5 = x