An explosion breaks a rock into three parts in a horizontal plane. Two ofthem go off at right angles to each other . The first part of mass 1 kg moves with a speed of 12 m//s and the second part of mass 2 kg moves with 8 m//s. If the third part flies off with 4 m//s the speed , then its mass is

An explosion breaks a rock into three parts in a horizontal plane. Two

1.	An explosion breaks a rock into three parts in a horizontal plane. Two ofthem go off at right angles to each other . The first part of mass 1 kg moves with a speed of 12 m//s and the second part of mass 2 kg moves with 8 m//s. If the third part flies off with 4 m//s the speed , then its mass is
Answer» ANSWER :B