Question

Pls explain the easiest way you an this will help me Thanks XD

Answer 1

The ratio is 4:3:1
let the ratio be 4x:3x:x
according to the question,4x+3x+x=40
8x=40
x=5
therefore amount of gravel=x*4=5*4=20$m^{3}$
amount of sand=5*3=15$m^{3}$
amount of cement=5*1=5$m^{3}$