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Answer :

1) We have,


Area of canvas = 551 m2


Area of canvas lost in wastage = 1 m2


Area of canvas used in making tent


= (551-1) m2 = 550 m2


= Surface area of the cone = 550 m2


We have,


r = radius of the base of the cone = 7 m


Surface area = 550 m2 = πrl = 550


=×7×l=550 = l = 25 m


Let h be the height of the cone. Then,


l2 = r2+h2 = h = = = 24 m


Volume of the cone =


= m3 = 1232 m3


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