Question

Find the area of a ring shaped region enclosed
between two concentric circles of radii 20 cm
and 15 cm.
ANSWER = 550​

Answer 1

Answer:

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Answer 2

Answer:

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