Multiple choice

If the radius of circle is increased by 4 times, what will be the percentage increase in its area? यदि एक वृत्त की त्रिज्या में 4 गुना वृद्धि कर दी जाए, तो इसके क्षेत्रफल में प्रतिशत वृद्धि कितनी होगी?

  1. 300%

  2. 400%

  3. 1500%

  4. 1600%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When radius increases by 4 times, the new area becomes (4r)^2 = 16r^2, which is 16 times the original area. This represents a 1500% increase since (new area - original area) / original area × 100 = (16-1)/1 × 100 = 1500%. Option C (1500%) is correct.

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