Two similar cones are shown in the image below.

What is the approximate surface area of the larger cone?

1544.4 square yards

978.5 square yards

2,162.3 square yards

1,103.1 square yards

Question

Two similar cones are shown in the image below. 
  
  

What is the approximate surface area of the larger cone? 

 1544.4 square yards 

 978.5 square yards 

 2,162.3 square yards 

 1,103.1 square yards

anonymous · Answer

attachment

across · Answer

This is a proportion problem; you need to know how to set up a proportion to estimate the radius of the larger cone. You also need to know how to compute the surface area of a cone. Where are you stuck?

anonymous · Answer

everything

anonymous · Answer

@bngaure @bobbylynn @EsmeraldaT @eliassaab @Emily_Martin_14 @RioAnne

across · Answer

I'll give you a hint: the surface area of a cone is$$SA=\pi r^2+\pi rl,$$where|dw:1346792025872:dw|

across · Answer

That's about half of the problem right there, and what do you mean with "everything"?

anonymous · Answer

why did you tag me in this?

anonymous · Answer

cause i need helpppppppppppppppppppppppppppppppppppppppppp

anonymous · Answer

oh k well im really sorry i dont know this :(  do you have a formula for finding the surface of a cone?

across · Answer

Sometimes I really wonder if people can see my posts, lol.

anonymous · Answer

lol

anonymous · Answer

how you do that!!!!!!

anonymous · Answer

@crystal1 the other girl across is helping you find the answer

anonymous · Answer

@crystal1 umm what grade r u in?

anonymous · Answer

10

anonymous · Answer

oh thats why i dont understand it in only in 9th

anonymous · Answer

lol

across · Answer

I don't think @crystal1 wants my help. <:) Oh well, good luck!

anonymous · Answer

yes i do

anonymous · Answer

well take her help and work it out