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]

a.) 3
b.) 6
c.) 8
d.) 10

Question

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]

a.) 3
b.) 6
c.) 8
d.) 10

retireed · Answer

It is a volume question...  V = LWH

with a twist on determining the width.

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retireed · Answer

First the cost per cubic foot...
          $98/yd^3    =  $98/27 ft^3      cost of concrete is $3.63 per cubic foot

Then how much concrete did Kevin buy....
          $72.59 / $3.63 per cubic foot  =  20 cubic feet of concrete purchased

Now solve V = LWH    solve for W

             W = V / LH   _____________

PS my original answer didn't makes sense, so in checking I made a grievous conversion error....  cubic yards is 27 cubic feet, no 9 cubic feet.  Speed kills