Question

5. The radius of a right circular cylinder is doubled keeping the height same. The ratio between the volumes of the
new cylinder and the original cylinder is
(b) 4:1
(d) 8:1
(a) 2:1
(c) 3:1​

Answer 1

Answer:

2:1 is correct answer

Step-by-step explanation:

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Answer 2

Answer:

(b) 4:1

Step-by-step explanation:

The volume of the new cylinder is 4 times that of the original.

V1 = pi×ŕ^2× h

V2 = pi × (2r)^2 × h = pi × 4r^2 × h

V2 = 4 (pi × r^2 × h)

V2:V1 = 4:1