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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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