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Explanation:
Let the ratio be 3x : 5x .
A.T.Q.
Curved Surface area = πrl
423.9 = 3.14 × 3x × 5x
423.9/3.14 = 15x^2
135 = 15x^2
9 = x^2
x = 3 cm
Radius = 3 × 3cm = 9cm
Slant Height = 5 × 3cm = 15cm
Volume = πr^2l / 3
= 3.14 × 9 × 9 × 15 / 3
= 3.14 × 405
= 1271.7 cm^3
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