alleryएक बेलन की त्रिज्या दोगुनी और उसकी ऊंचाई आधी कर दी जाती है। इसके आयतन में क्या परिवर्तन होगा?
Aयह चार गुना हो जाता है
Bयह घटकर आधा रह जाता है
Cयह अपरिवर्तित रहता है
Dयह दोगुना हो जाता है
Answer & Solution
Correct answer: D. यह दोगुना हो जाता है
आयतन r के वर्ग और h के गुणनफल के अनुपात में बदलता है, इसलिए 4 x 1/2 = 2 और आयतन दोगुना हो जाता है।
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