Question

You are in charge of ordering the concrete for a basement wall concrete pour. The wall forms are all set up and ready. The wall around the basement is 10 inches thick. The interior finished dimension of the basement is 120 feet 5 inches by 86 feet 4-1/2 inches and fourteen (14') feet tall. What is the exact quantity of concrete in cubic yards (CY) to order plus three (3%) per cent added for spilled concrete.

Answer 1

189.15cy

Step-by-step explanation:

To understand this problem we need to understand as well the form.

It is clear that there is four wall, two short and two long.

The two long are
`\rightarrow 120ft5in+2(10ft)`

The two long are
`\rightarrow 122ft1in=122.08ft`

The two shors are
`\rightarrow 86ft4.5in = 86.375ft`

The height and the thickness are 14ft and 0.83ft respectively.

So we only calculate the Quantity of concrete,

`Q_c = [(2*122.08)+(2*86-375)]*14*0.833\\Q_c=4864.02ft^3`

That in cubic yards is equal to
`180.15 (1cy=27ft^3)`

Hence, we need order 5% plus that represent with the quantity

`Q_(ordered)=1.05*180.15=189.15cy`