Multiple choice

Volume of sphere is increased by 119.7%. Find the percentage change in its radius. एक गोले का आयतन 119.7% बढ़ गया। इसकी त्रिज्या में प्रतिशत वृद्धि ज्ञात कीजिए।

  1. 25%

  2. 15%

  3. 10%

  4. 30%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Volume increases by 119.7%, so new volume = 2.197 × original. Volume formula V = 4/3πr³. New radius: r' = r × (2.197)^(1/3) = r × 1.3. Percentage increase = (1.3 - 1) × 100 = 30%. Cube root of 2.197 ≈ 1.3.

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