please ans fast 2 radius of 2 circle are in the ratio 3:4
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Answer:
r=20 cm
Step-by-step explanation:
3x:4x
sum of area of two circles=area of third circle
area of circle = pie r2
=22/7×6×6
=22/7×36
3x=6 cm
x=2cm
area of circle= pier2
=22/7×2×2
=22/7×4
22/7×36+22/7×4
22/7×(36+4)
22/7×40
22/7×40=pie r2
22/7×40=22/7×r2
40=r2
r= root 40
r=20 cm
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