On the application of a constant torque, a wheel is turned from rest to $400 \mathrm{rad}$ in $10 \mathrm{s}$. If same torque continues to act, the angular velocity of the wheel after $20 \mathrm{s}$ from the start is

• Correct answer
  A

  $160 \mathrm{rad} {\mathrm{s}}^{-1}$
• B

  $150 \mathrm{rad} {\mathrm{s}}^{-1}$
• C

  $120 \mathrm{rad} {\mathrm{s}}^{-1}$
• D

  $130 \mathrm{rad} {\mathrm{s}}^{-1}$

Hence, the correct answer is option: 'A'.