The radius of a wire is decreased to one “third if volume remains the same le

Question

The radius of a wire is decreased to one “third if volume remains the same length will increase

Options:

A . 1 Time

B . 3 times

C . 6 times

D . 9 times

Answer: Option D

Let the original radius = r and
Original length = h
New radius = 1/3 r.
Let new length = H

Therefore, H = 9h
Length becomes 9 times

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