Find the area of a circle made of 1 mtr wire?
1. 798 cm2
2. 799 cm2
3. 796 cm2
4. 795.45 cm2
1. 798 cm2
2. 799 cm2
3. 796 cm2
4. 795.45 cm2
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Correct Answer – Option 4 : 795.45 cm2
Calculation:
Circumference of circle = 1 m = 100 cm
Formula used:
Circumference of circle = 2πr
Area of circle = πr2
Value of π = 22/7
Calculation:
According to question,
2 × (22/7) × r = 100 cm
⇒ r = 700/44 cm
⇒ 175/11 cm
Now, area of circle = π × (175/11) × (175/11) cm2
⇒ (22/7) × (175/11) × (175/11) cm2
⇒ 795.45 cm2
∴ The area of circle is 795.45 cm2