find the volume of a cone with slant height (NOT PERPENDICULAR HEIGHT) 21cm and radius 12cm
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Answers
Answer:Given: A cone with hemispherical surface.
Slant Height (l)=12 cm
diameter (d)=21 cm
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=12 cm and r=d/2=21/2=10.5 cm
∴π(12)(
2
21
)+2π(
2
21
)
2
=1088.01 cm
2
Step-by-step explanation:
Given: A cone with hemispherical surface.
Slant Height (l)=12 cm
diameter (d)=21 cm
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=12 cm and r=d/2=21/2=10.5 cm
∴π(12)(
2
21
)+2π(
2
21
)
2
=1088.01 cm
2