Question

Can someone please help me? I really need help... I will fan and Medal
Question~
A farmer has 2 irrigation sprinklers; one covers a circle with radius r and the other covers a circle with radius 4r. Find the ratio of the smaller irrigation circle to the area of the larger irrigation circle.

Answer 1

do you know formula for area of a circle ?

Answer 2

A=pr^2 ?

Answer 3

pi*r^2 =area of a circle yes ?

Answer 4

I thought it was A=pr^2?

Answer 5

area of circle with radius r = pi *r^2 where pi=3,14
area of circle with radius 4r = pi *(4r)^2 where pi=3,14

ratio area of smaller to area the larger = pi*r^2 / pi*(4r)^2 =

= pi*r^2 / pi * 16r^2 = 1/16

ratio area smaller to the area larger circle = 1/16

Answer 6

thank you very much!! you made this make so much more sense!

Answer 7

np

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