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If the curved surface area of a solid cy...

If the curved surface area of a solid cylinder is one-third of its total surface area, then what is the ratio of its diameter to its height ?
यदि किसी ठोस बेलन का वक्र पृष्ठ क्षेत्रफल इसके कुल पृष्ठ क्षेत्रफल का एक-तिहाई है, तो इसके व्यास और इसकी ऊंचाई में अनुपात ज्ञात करें |

A

`2:1`

B

`1:1`

C

`4 :2`

D

`5:5`

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A solid hemisphere has radius 14 cm. It is melted to form a cylinder such that the ratio of its curved surface area and total surface area is 2:3. What is the radius (in cm) of its base? एक ठोस अर्धगोले की तिज्या 14 से.मी. है। इसे पिघलाकर एक बेलन इस प्रकार बनाया जाता है कि उसके बक्र पृष्ठीय क्षेत्रकल तथा कुल पृष्ठीय क्षेत्रफल का अनुपात 2 : 3 है। इसके आधार की त्रिज्या (से.मी. में) कया है?

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