जॉइन Examsbookउत्तर : 1. "100 π"
If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in sq.cm) is ?5
प्र: If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in sq.cm) is ?
- 1100 πtrue
- 2101/πfalse
- 399 π/12false
- 454/13πfalse
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उत्तर : 1. "100 π"
व्याख्या :
Answer: A) 100 π Explanation: 4/3 π x 10 x 10 x 10 = 8 x 4/3 π x r x r x rr = 54π x 5 x 5 = 100π