खोखले बेलन के पदार्थ का आयतन क्या होता है? Khokhle Belan Ke Padarth Ka Aayatan Kya Hota Hai?
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खोखले बेलन के पदार्थ का आयतन क्या होता है? Khokhle Belan Ke Padarth Ka Aayatan Kya Hota Hai?

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खोखले बेलन के पदार्थ का आयतन (Khokhle Belan Ke Padarth Ka Aayatan) —

$=\pi h\left(R^2-r^2\right)$

$=\pi h(R+r)(R-r)$

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