Total surface are of the cone 704cm2 the radius of the base is 7cm find the curved surface area of the cone
Answers
Answered by
5
TSA of cone = 22/7*7 (7+l)
704 = 22(7+l)
32 = 7 + l
l = 32 - 7
l = 25 cm
CSA of cone = 22/7*7*25
= 22*25
= 550 cm^2
704 = 22(7+l)
32 = 7 + l
l = 32 - 7
l = 25 cm
CSA of cone = 22/7*7*25
= 22*25
= 550 cm^2
Answered by
5
Given:
- Total surface are of the cone is 704cm²
- Radius of the base is 7cm
To find out:
Find the curved surface area of the cone.
Formula used:
- Total surface area of cone = πr ( r + l)
- Curved surface area of cone = πrl
Solution :
Total surface area of cone = πr(r+l)
➭ 704 = 22/7×7 (7+l)
➭ 704 = 22(7+l)
➭ 704/22 = 7 + l
➭ l = 32 - 7
➭ l = 25 cm
Now,
Curved surface area of cone = πrl
= 22/7×7×25
= 22×25
= 550cm²
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