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Question

the radius of the base of a conical tent is 12 m and it's height is 9 m. find the area of canvas used to make the tent. also find the volume of air contained in the tent.

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Solution

area of canvas used = lateral surface area of cone=πrlHere radius = 12 m Height = 9 m So lateral height =r2+h2 =81+144=15So area of canvas used =227×12×15=565.71 m2volume of air contained = πr2h=227×122×9=4073.14 m3

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