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Question

Q. टिन का एक टुकड़ा आयत की आकृति में हैं, जिसकी लंबाई 12 सेमी तथा चौड़ाई 8 सेमी हैं। इसका उपयोग कर एक बंद घन निर्मित किया जाता हैं। घन की भुजा की लंबाई क्या होगी?

A
2 सेमी
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B
3 सेमी
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C
4 सेमी
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D
6 सेमी
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Solution

The correct option is C 4 सेमी

आयत का क्षेत्रफल =12×8=96 सेमी2

घन का क्षेत्रफल =6a2

तब, 96=6a2 या a2=16

=>a=4 सेमी


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