Using the Area Formula

The area of a yard is 240 feet by 82 feet. John needs to fertilize his yard . The fertilizer is 0.03 ounce per square foot. How much fertilizer does he need?

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Using the Area Formula

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Jul 14, 2010
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by: Karin

If John's yard is 240 feet by 82 feet, then that means that the length is 240 feet and the width is 82ft.

The Area formula for a rectangle is:
A = length x width or A = lw

First we need to find the area of John's yard.
A = lw
A = 240ft x 82ft
A = 19680 ft^2

John's yard is 19680 ft^2.

If .03 oz fertilizer covers 1 sq foot, then we would need:
.03 x 19680 = 590.4 oz of fertilizer.

John needs 590.4 oz of fertilizer.

Hope this helps,
Karin

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