Volume of a right circular cone is 2200 by 7 cm cube and its diameter is 10 cm. Find its curved surface area.
Answers
Answered by
12
Given,
Volume = 2200/7 = 1/3 * π* r^2 * h....
Also, r is 5 cm...
So, h is 12 cm.....
Now, l = slant height = (h^2 + r^2)^1/2
= 13 cm.....
So, CSA = π * r * l
= 1430/7 cm^2.....
Hope this helps U
Volume = 2200/7 = 1/3 * π* r^2 * h....
Also, r is 5 cm...
So, h is 12 cm.....
Now, l = slant height = (h^2 + r^2)^1/2
= 13 cm.....
So, CSA = π * r * l
= 1430/7 cm^2.....
Hope this helps U
Answered by
17
Diameter of base of cone = 10 cm
Radius= 5 cm
Volume= 2200/7
=> 1/3 pi r^2 h = 2200 / 7
=> 1/3 × 22 /7 × (5)^2 × h = 2200 / 7
=> h = 300 / 25
=> h = 12 cm
Slant height= sqrt ( r^2 + h^2)
= sqrt ( 5^2 + 12^2)
= sqrt ( 25 + 144)
= sqrt ( 169)
= 13 cm
CSA = pi × r × l
= 22 × 5 × 13 /7
= 1430/7 cm^2
Radius= 5 cm
Volume= 2200/7
=> 1/3 pi r^2 h = 2200 / 7
=> 1/3 × 22 /7 × (5)^2 × h = 2200 / 7
=> h = 300 / 25
=> h = 12 cm
Slant height= sqrt ( r^2 + h^2)
= sqrt ( 5^2 + 12^2)
= sqrt ( 25 + 144)
= sqrt ( 169)
= 13 cm
CSA = pi × r × l
= 22 × 5 × 13 /7
= 1430/7 cm^2
Similar questions