Question 8. Area of a circle is 154 cm2, find its circumference
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Answered by
5
Answer:
Circumference of the circle = 44 cm.
Step-by-step explanation:
Area of a circle = πr²
πr² = 154 cm² (given)
For convenience, apply the fractional value of π
∴ 22/7 × r² = 154 cm²
r² = 154 × 7/22
r² = 7 × 7 ( On dividing 154 by 22 , we got 7)
r² = 49
∴ r = 7 cm.
Circumference of the circle = 2πr = 2 × (22/7) × 7
= 2 × 22 (both sevens are cancelled)
= 44 cm.
∴ 44 cm is the circumference of the circle with an area of 154 cm².
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Answered by
0
Answer: 44 cm
Step-by-step explanation:
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