If radius of a circle is increased to twice its original length, how much will the area of the circle increase ?
- 4 times
- 5 times
- 2 times
- None
Explanation
- Let r be the radius of a circle.
- Then, the area of the circle = πr^2
- If radii are doubled, than radii become 2r.
- Now, area of circle =π(2r) 2
- =4π.
- Therefore, the area of the circle is increased by 4 times.
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- LW+LH+WH
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اس سوال کو وضاحت کے ساتھ پڑھیں
- 118 m²
- 138 m²
- 158 m²
- 178 m²
اس سوال کو وضاحت کے ساتھ پڑھیں
- 66.5 m²
- 76.5 m²
- 56.5 m²
- 133 m²
اس سوال کو وضاحت کے ساتھ پڑھیں
- 1.15%
- 3.07%
- 2.01%
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 300
- 400
- 500
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
