On applying a constant torque, a wheel a...

On applying a constant torque, a wheel at rest, turns through `400` radian in `10 s`. Find angular acceleration. If same torque continues to act, what will be angular veclocity of the wheel after `20 s` from stars ?

`160 " rad s"^(-1)`

`150 " rad s"^(-1)`

`120 " rad s"^(-1)`

`130 " rad s"^(-1)`

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