Question

someone please help! I need to graduate :(
The two cones are similar. Find the surface area of the larger cone. Round your answer to the nearest hundredth
A. 810.28mm^2
B 847.80mm^2
C 868.30mm^2
D 886.25mm^2

Answer 1

@Howard-Wolowitz @skullpatrol can anyone smart help! please

Answer 2

@johnweldon1993 can you help? :D

Answer 3

? ;o

Answer 4

Maybe :P

Lol so it's like the last one, set up a proportion to solve for the radius of the larger cone using slant heights and radius

\[\large \frac{SH_{bigger}}{R_{Bigger}} = \frac{SH_{smaller}}{R_{smaller}}\]

\[\large \frac{13.8}{x} = \frac{4.6}{3.7}\]

Solving for 'x' we get

\[\large x = \frac{13.8 \times 3.7}{4.6} = 11cm\]

So now we have the radius of the bigger one

And now the surface area is \[\large SA = \pi r^2 + \pi rl\]

So for you we have

\[\large SA = \pi (11.1cm)^2 + (\pi \times 11.1m \times 13.8cm) = ?\]

Answer 5

Lol sorry I was typing ;P

And also, I see the answer choices are in mm?? that's odd because the measurements are in cm

I'm gonna assume a typo :)

*also, I messed up and put 'm' somewhere and it should be 'cm' sorry :P

Answer 6

C? THANK YOUUUUUUUUUUUUUUUUUUU

Answer 7

Perfect :)