17. A hollow metallie cylindrical tube has an internal radius of % em and height 21 cm
thickness of the metal is 0.5 cm. The tube is melted and east into a right rouler se
height 7 cm. Find the radius of the cone, correct to one decimal place,
Hint. Let the radius of the cone formed ber om.
Then, 1 x 13.52 - 321 1. p. 71
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Answer is 71 and 71 is correct answer
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