An explosion blows a rocket into three parts. Two-piece go off at right angles to each other, a 100 kg piece at 12 m/s, and 200 kg piece at 8 m/s. Then the mass of the third piece which flies off at an angle of 53° is

A. 10 kg
B. 20 kg
C. 30 kg
D. 40 kg

Leave a Reply