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A mass (M) is suspended from a spring of...

A mass (M) is suspended from a spring of negligible mass. The spring is pulled a little and then released so that the mass executes SHM of time period T. If the mass is increased by m, the time period becomes `(5T)/3`. Then the ratio of `m/M` is .

A

`(3)/(5)`

B

`(25)/(9)`

C

`(16)/(9)`

D

`(5)/(3)`

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