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.
Related MCQs
- 8 times
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- none of these
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- 3.14CM^2
- 4.14CM^2
- 3.14 mm
- None of these
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دیئے گئے نمبر کے مربع جڑ کا اخراج کیا ہے؟
- Binary operation
- Relation
- Unary operation
- Relation in some set
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- 0 degree
- 10 degree
- 15 degree
- 20 degree
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