A wheel of moment of inertia 2 kgm^(2) ...

A wheel of moment of inertia `2 kgm^(2)` is rotating about an axis passing through centre and perpendicular to its plane at a speed `60 rad//s`. Due to friction, it comes to rest in 5 minutes. The angular momentum of the wheel three minutes before it stops rotating is

`"24 kg m"^(2)//s`

`"48 kg m"^(2)//s`

`"72 kg m"^(2)//s`

`"96 kg m"^(2)//s`

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