Calculate 3167

The area of the two circles is in a 4:9 ratio. The larger circle has a diameter of 12 cm. Calculate the radius of the smaller circle.

Correct answer:

r1 =  4 cm

Step-by-step explanation:

D2=12 r2=D2/2=12/2=6 r1:r2 = 4:9 r1=r2 4/9=6 4/9=4 cm

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