a toy is in the form of a cone mounted on a hemisphere of common base radius 7cm. the total height of the toy is 31cm.find the total surface atea of the toy.
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Answered by
247
CSA of cone = πrl
=(22/7)(7)(√(r²+h²))
=(22)(√7²+(31-7)²)
=(22)(√49+576)
=(22)(√625)
=(22)(25)
=550 cm²
CSA of hemisphere=2πr²
=2(22/7)(7²)
=(44/7)(49)
=(44)(7)
=308 cm²
Therefore, total surface area of the toy = CSA of cone + CSA of hemisphere
=550+308
=858 cm²
=(22/7)(7)(√(r²+h²))
=(22)(√7²+(31-7)²)
=(22)(√49+576)
=(22)(√625)
=(22)(25)
=550 cm²
CSA of hemisphere=2πr²
=2(22/7)(7²)
=(44/7)(49)
=(44)(7)
=308 cm²
Therefore, total surface area of the toy = CSA of cone + CSA of hemisphere
=550+308
=858 cm²
Answered by
40
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