If the diameter of a circle is increased by 100%, its area is increased by ______?
- 200%
- 300%
- 400%
- None of these
Explanation
Original radius = r
Original area = pi r^2
New diameter = 2 × original diameter
New radius = 2r
New area = pi (2r)^2 = 4 pi r^2
Increase in area = New area - Original area
= 4 pi r^2 - pi r^2 = 3 pi r^2
Percentage increase = (3 pi r^2 / pi r^2) × 100
= 300%
Related MCQs
- 500
- 600
- 480
- 976
اس سوال کو وضاحت کے ساتھ پڑھیں
- 20%
- 25%
- 30%
- 15%
اس سوال کو وضاحت کے ساتھ پڑھیں
- Rs. 55,000
- Rs. 60,000
- Rs. 65,000
- Rs. 70,000
اس سوال کو وضاحت کے ساتھ پڑھیں
- Rs. 2,150
- Rs. 2,250
- Rs. 2,300
- Rs. 2,350
اس سوال کو وضاحت کے ساتھ پڑھیں
- 112.5
- 112.6
- 112.7
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
