Question

Help will medal!!!!

Kevin plans to put concrete on a rectangular portion of his driveway. The portion is 10 feet long and three inches high. The price of concrete is $98 per cubic yard. The total cost of the concrete Kevin needs is $72.59. Which of the following is closest to the width of the portion of the driveway on which Kevin plans to put concrete?

[1 foot = 12 inches; 1 yard = 3 feet]

3 feet

6 feet

8 feet

10 feet

Answer 1

Option C is the correct answer.

Explanation:

Volume = Length x Breadth x Height

Length = 10 feet = 3.33 yard

Height = 3 inches = 0.25 feet = 0.0833 yard

The price of concrete is $98 per cubic yard and total cost is $72.59.

`\texttt{Total concrete needed = }(72.59)/(98)=0.74yard^3`

We have

Volume = Length x Breadth x Height = 0.74

3.33 x Width x 0.0833 = 0.74

Width = 2.67 yards = 2.67 x 3 = 8 feet

Option C is the correct answer.

Answer 2

The answer is 8 feet. $72.59/$98 = .740714. 3 inches = 0.083333 yards. 10 feet = 3.333 yards. 8 feet = 2.66667 yards. 0.08333 * 3.333 * 2.6667 = .74066. 0.74066 is very close to 0.740714.