maths

Given: A cone with hemispherical surface.

Slant Height $(l)=12cm$

diameter $(d)=21cm$

Total surface area= Total surface Area

of cone + Total surface area of Hemisphere

Total surface area of cone $=πre+πr_{2}$

But since we have a hemispherical surface as be $x$

Total surface are of cone will be $=πrl$

Total surface area of hemisphere $=3πr_{2}$

but since the base of cone hemisphere is some and total surface area will not consider any be $x$ area

$∴$ Total surface area of hemisphere in this case $=2πr_{2}$

Total surface area = Total surface area of cone+ Hemisphere

putting value of $l=12cm$ and $r=d/2=21/2=10.5cm$

$∴π(12)(221 )+2π(221 )_{2}$

$=1088.01cm_{2}$

Answered By

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