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 Evan is landscaping his backyard. The yard is shaped like a rectangle and measures 80 feet by 70 feet. He wants to spread topsoil evenly ove

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Evan is landscaping his backyard. The yard is shaped like a rectangle and measures 80 feet by 70 feet. He wants to spread topsoil evenly over the entire surface. One load of topsoil will cover 400 square feet, 4 inches deep. How many loads of dirt does Evan need in order to cover his entire yard?

 Sep 15, 2014

Best Answer 

 #1
avatar+129840 
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4 inches = 1/3ft

So in one load, there are  400 x 1/3 = 400/3 ft3

And the number of cubic feet required  = 80 x 70 x 1/3  = 5600/3 ft3

So the number of loads required =

(5600/3) /  (400/3) = 5600/400 = 14

 

 Sep 15, 2014

1+0 Answers

 #1
avatar+129840 
+5
Best Answer

4 inches = 1/3ft

So in one load, there are  400 x 1/3 = 400/3 ft3

And the number of cubic feet required  = 80 x 70 x 1/3  = 5600/3 ft3

So the number of loads required =

(5600/3) /  (400/3) = 5600/400 = 14

 

CPhill Sep 15, 2014

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