andy wants to build a circular concrete patio in his backyard and install a jungle gym on top of it. One 80-lb bag on concrete will be enough for 2 square feet. If he wants the diameter of the patio to be 10 ft,how many bags of concrete will he need to purchase ?

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2016-04-18 03:36:51

79 bags of concrete need to be purchased. [latex] pi r^{2} [/latex] = Area [latex] pi [/latex] * [latex] 5^{2} [/latex] = 78.53981......

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