Q. A cannon of weight 10 tonnes fires a shell of 50 kg with a muzzle velocity of 900 m/sec at an angle of 30^o. The time taken for the shell to emerge from the barrel is 0.004 sec. The velocity of the cannon would be

• (A) 3.9 m/sec
• (B) 7.8 m/sec
• (C) 8.95 m/sec
• (D) 1.95 m/sec