Multiple choice

On increasing the diameter of a circle by 40%, its area will be increased by- वृत्त के व्यास में 40% की वृद्धि होने पर इसके क्षेत्रफल में वृद्धि होगी?

  1. 40%

  2. 80%

  3. 96%

  4. 82%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When diameter increases by 40%, radius also increases by 40%. Area depends on radius², so new area = (1.4r)² = 1.96r². Increase = 196% - 100% = 96%. The area becomes almost double because of the squared relationship in the area formula.

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