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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

`4:1`

D

`5:2`

Text Solution

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The correct Answer is:
C
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The ratio of the curved surface area and total surface area of a right circular cylitiderds 2 : 5. If the total surface area is 3080 cm^2 , then what is the volume (in cm^3 ) of the cylinder? एक लम्बवत वृत्ताकार बेलन के वक्र पृष्ठीय क्षेत्रफल तथा कुल पृष्ठोय क्षेत्रफल का अनुपात 2 : 5 है। यदि कूल पृष्ठीय क्षेत्रफल 3080 से.मी.^2 है, तो बेलन का आयतन ( से.मी.^2 में) क्या है?

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If the sum of radius and height of a solid cylinder is 20 cm and its total surface area is 880 cm^2 then its volume is यदि किसी ठोस बेलन की त्रिज्या ऊंचाई का जोड़ 20 से.मी. हो और उसका कूल पृष्ठीय क्षेत्रफल 880 से.मी.^2 हो तो उसकाआयतन क्या होगा?

The total surface area of a solid cylinder is 1155 cm^2 . Its curved surface area is equal to two-fifths of its total surface area. What is the height of the cylinder? एक ठोस बेलन (सिलिंडर) का कुल पृष्ठ क्षेत्रफल 1155 cm^2 है | उसका वक्र पृष्ठ क्षेत्रफल, उसके कुल पृष्ठ क्षेत्रफल के2/5 के बराबर है | बेलन (सिलिंडर) की ऊंचाई (cm में) कितनी है? (pi= 22/7)

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A solid cylinder of height 9 m has its curved surface area equal to one-third of the total surface area. What is the radius of the base?

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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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