किसी बेलन की त्रिज्या 3 cm तथा ऊंचाई 5 cm है। उसे पिघलाया गया तथा 1 mm त्रिज्या तथा 1 cm ऊंचे शंकुओं में परिवर्तित किया गया। शंकुओं की संख्या ज्ञात करें?
A. 450
B. 1350
C. 8500
D. 13500
A. 450
B. 1350
C. 8500
D. 13500
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Correct Answer – D
Let the no. of cones `=x`
`implies pixx3^(2)xx5=x xx 1/3xx pixx(1/10)^(2)xx1`
`implies x=9xx5xx3xx100=13500`