A liquid filter shaped as a right circular cone is shown below.
If a similar cone has a slant height of 15 cm, what is its lateral area?
Answer

75π cm2

90π cm2

120π cm2

150π cm2

Question

A liquid filter shaped as a right circular cone is shown below.
 If a similar cone has a slant height of 15 cm, what is its lateral area?
Answer
		
75π cm2
		
90π cm2
		
120π cm2
		
150π cm2

anonymous · Answer

attachment

anonymous · Answer

Could you find this cone's radius from its similar one?

anonymous · Answer

do i use the formula  pi * r * l

anonymous · Answer

However you need radius to plug into its formula!

anonymous · Answer

oh yeahh i can't use 8?

anonymous · Answer

You can find the radius based on its similar cone!

anonymous · Answer

120?

anonymous · Answer

Would you show your calculation here?

anonymous · Answer

i honestly really don't have one ive been working since 6 this morning non-stop i know this is something i should probably get but im not getting much of anything right now...

anonymous · Answer

r / 15 = 8 / 20
->   r = 15 * 8 / 20 = 6 cm
Thus Lateral of cone = pi * r * s = 90 pi cm^2

anonymous · Answer

@cbrusoe ratio is essential concept!