MEDAL FOR THE FIRST TO ANSWER:
A liquid filter shaped as a right circular cone is shown below.

the figure shows the liquid filter as an open cone with a slant height of 15 cm and radius of 5 cm

If a similar cone has a slant height of 18 cm, what is its lateral area?

Question

MEDAL FOR THE FIRST TO ANSWER:
A liquid filter shaped as a right circular cone is shown below.
 
the figure shows the liquid filter as an open cone with a slant height of 15 cm and radius of 5 cm
 
If a similar cone has a slant height of 18 cm, what is its lateral area?

anonymous · Answer

90π cm2

54π cm2

108π cm2

75π cm2

anonymous · Answer

I think it's C but I'm not possative

anonymous · Answer

@kropot72 do you know how to do this?
@Diogo

anonymous · Answer

radius of new cone is (18*5)/15 = 6

so the answer is g*r*pi = 18*6 pi = 108 pi.

You're correct

anonymous · Answer

Yay! Thanks @Diogo!