find the curved surface area of cone
r=10
h=21
l=?
formula= πrl
I mark branliest to first question
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Answer:
730.73cm²
Step-by-step explanation:
using pythagorean theorem to find the slant height
a²+b²= c²
10²+21²= c²
100+441= c²
541= c²
c=√541
c= 23.26
formula= πrl
π*10*23.26
π*232.6
= 730.73cm²
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