Question

Tony calculates that 3 cubic metres of concrete is enough for the path.

He decides to use a concrete mix which has:

cement = 1 part
sand = 2 parts
gravel = 3 parts

How many cubic metres of gravel does Tony need?

Answer 1

Amount cubic metres of gravel need = 1.5 cubic meter

Explanation:

Given:

Parts

cement = 1 part

sand = 2 parts

gravel = 3 parts

Find:

Amount cubic metres of gravel need

Computation:

Amount cubic metres of gravel need = 3[Part of gravel / Total of all parts]

Amount cubic metres of gravel need = 3[3 / (1+2+3)]

Amount cubic metres of gravel need = 3[3 / 6]

Amount cubic metres of gravel need = 3[0.5]

Amount cubic metres of gravel need = 1.5 cubic meter