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2 years ago

I need help with this one to / surface area :)

Mathematics

2 answers:

nadezda [96]2 years ago

7 0

Step-by-step explanation:

the surface area (base area plus side wall) of a cone is, when we have the radius and the length of the slanted side wall :

SA = pi×r×(r + l)

in our case here

r = half of the diameter = 12/2 = 6 m

l = 13.4 m

so, we have

SA = pi×6×(6 + 13.4) = pi×6×19.4 = 365.6813849... m²

zzz [600]2 years ago

5 0

Answer:

389.9 to 1 decimal place

If you need another explanation comment on this one

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