volume of cone is 1212 cm cube and its height is 24 cm find the total surface area of cone
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Answered by
24
Volume = πr²h/3
1212 = πr²h/3
Using π = 22/7 and h = 24
r² = 48.20
r = 6.9429 cm
Curved surface area = π r l
l = √(r²+h²) = √ (48.20 + 24²) = 24.984
CSA = 22/7 x 6.9429 x 24.984 = 545.1 cm²
1212 = πr²h/3
Using π = 22/7 and h = 24
r² = 48.20
r = 6.9429 cm
Curved surface area = π r l
l = √(r²+h²) = √ (48.20 + 24²) = 24.984
CSA = 22/7 x 6.9429 x 24.984 = 545.1 cm²
Answered by
15
Volume of cone =1/3×πr²h
1212=22×24×r²/21
25452=528r²
25452/528=r²
48.20=r²
6.94=r
so,
l²=h²+r^2
l² =24^2+48.20
l² =576+48.20
l² = 624.20
l =√624.20
l =24.98
so slant hieght=l=24.98 cm
so total surface area=22*6.94(6.94+24.98)/7=696.22cm^2
1212=22×24×r²/21
25452=528r²
25452/528=r²
48.20=r²
6.94=r
so,
l²=h²+r^2
l² =24^2+48.20
l² =576+48.20
l² = 624.20
l =√624.20
l =24.98
so slant hieght=l=24.98 cm
so total surface area=22*6.94(6.94+24.98)/7=696.22cm^2
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