Question

the area of a circular plate is 38.5 cm² . the diameter of the plate is
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Answer 1

Given:-

• Area of the circular plate is 38.5 cm².

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To find:-

• Diameter of the plate.

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Solution:-

We know that,

→ Area of the circle = πr²

→ 38.5 = (22/7) × r²

→ (38.5 × 7) ÷ 22 = r²

→ 269.5 ÷ 22 = r²

→ 12.25 = r²

→ r = 3.5 cm

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Now,

→ Diameter = 3.5 × 2

→ Diameter = 7 cm

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Hence,

• the diameter of the plate is 7 cm.