The ratio of the radii of two circles is 4:5 . Find the ratio of their area.
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Step-by-step explanation:
THE RADII ARE IN THE RATIO OF
4:5
LET THE RADII BE 4X AND 5X
AREAS ARE IN THE RATIO
π(4X)² : π(5X)²
16X²π : 25X²π
CANCEL THE X² AND π ON BOTH SIDES
16:25
AREAS ARE IN THE RATIO
16:25 .
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