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Salsk061 [2.6K]
3 years ago
13

The total surface area of a right circular cone is 256 square feet. If I slant height of the cone is three times the length of a

radius of the base, find the length of a radius
Mathematics
3 answers:
prohojiy [21]3 years ago
6 0

we are given

total surface area is 256

we can use formula

TA=\pi r^2 +\pi r l

l is slant height

r is radius

we are given

l=3r

so, we can plug it

TA=\pi r^2 +\pi r *3r

TA=4\pi r^2

now, we can plug TA=256

256=4\pi r^2

now, we can solve for r

we get

r=4.51352...........Answer

garik1379 [7]3 years ago
5 0

we are given

total surface area is 256

we can use formula

TA=\pi r^2 +\pi r l

l is slant height

r is radius

we are given

l=3r

so, we can plug it

TA=\pi r^2 +\pi r *3r

TA=4\pi r^2

now, we can plug TA=256

256=4\pi r^2

now, we can solve for r

we get

r=4.51352...........Answer

Sergeeva-Olga [200]3 years ago
3 0

what are the answers

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