what is the surface area of the cone? with a radius of 7cm and a height of 24cm.
a-175 pi cm^2
b-224 pi cm^2
c-273 pi cm^2
d- 147 pi cm^2

Question

what is the surface area of the cone? with a radius of 7cm and a height of 24cm.
a-175 pi cm^2
b-224 pi cm^2
c-273 pi cm^2
d- 147 pi cm^2

sleepyhead314 · Answer

Hello and Welcome to OpenStudy! :)

the surface area of a cone = pi(radius)(√(height^2 + radius^2)) + pi(radius)^2
so plug in
radius = 7
and height = 24

anonymous · Answer

i dont understand i did that not giving the answer i need

sleepyhead314 · Answer

sorry if it was a little confusing :/

try
7*(√(24^4+7^2))pi + (7^2)pi
7*(25)pi + 49pi = ?

anonymous · Answer

703.71675

sleepyhead314 · Answer

Correct :) That's what I got ^_^

anonymous · Answer

but that is not an option for my answer ugh?

sleepyhead314 · Answer

hmmm
what are your options then?

anonymous · Answer

a= 175 pi cm^2
b= 224 pi cm^2
c=273 pi cm^2
d= 147 pi cm^2

sleepyhead314 · Answer

ah right, so they want you to keep pi in there

so you can either divide the 703.7167544 thing by pi

or  (7*25) + (49) = ?