find the area of a ring shaped region enclosed between two concentric circles of radii 20 cm and 15 cm
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the correct answer is = 25*22=550
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mayank1741:
wrong anser
now its correct
yes
OK
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Answer:
Area of ring = π(20)² – π(15)²
= 400π – 225π
= 175 π
= 549.7 cm²
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