If the radius of a cylinder is doubled and the height remains same, the volume will be

(a) doubled

(b) halved

(c) same

(d) four times

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Solution

Let V₁ be the volume of the cylinder with radius r₁ and height h₁, then

……. (1)

Now, let V₂ be the volume after changing the dimension, then

So,

Hence, the correct option is (d)

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