find the TSA of cone whose radius is r:2 and slant height is 2l
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Answer: Solution
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Correct option is B)
We know, the total surface area of cone=πr(r+l).
Given, radius =
2
r
and slant height =2l.
Therefore, the new total surface area of cone =π×
2
r
(
2
r
+2l)
=π(
4
r
2
+rl)
=πr(l+
4
r
).
Therefore, option B is correct.
Step-by-step explanation: Brainliest
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Answer:
The correct answer is 144.5 unit square.
Step-by-step explanation:
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