Find the area of a ring shaped region enclosed
between two concentric circles of radii 20 cm
and 15 cm.
ANSWER = 550
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550 cm²
Step-by-step explanation:
Area covered by ring = area of large circle - area of small circle
• Area of circle = πr^2, r is radius.
Therefore,
Area of ring = π(20)² - π(15)²
= 400π - 225π
= 175π , π = 22/7
= 175(22/7)
= 550 cm²
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