Problema Solution
if a mixture of concrete is made up of sand and cement in a ratio of 5 to 3. How many cubic feet of each are needed to make 96 cubic feet?
Answer provided by our tutors
Let
x = cubic feet of sand
y = cubic feet of cement
x : y = 5 : 3 cross-multiply
3x = 5y
x + y = 96
........
click here to see the system of equations solved for x and y
........
x = 60 ft^3
y = 36 ft^3
60 cubic feet of sand and 36 cubic feet of cement are needed.