- A23
- B21
- C17
- D19
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Concept: .
- .
- Equal volumes: .
- 21 cm.
Trick: Cylinder with has volume – identical to a hemisphere's formula, so r stays 21.
Answer: (B) 21
अवधारणा: ।
- ।
- आयतन बराबर: ।
- 21 cm।
ट्रिक: वाले बेलन का आयतन अर्धगोले के सूत्र जैसा – r = 21 ही।
उत्तर: (B) 21
