A body at rest breaks up into 3 parts. If 2 parts having equal masses fly off perpendicularly each after with a velocity of 12m/s when the velocity of the third part which has 3 times mass of each part is 1. 42–√m/s at an angle of 45^∘ from each body 2. 242–√m/s at an angle of 135^∘ from each body 3. 42–√m/s at 135^∘ from each body 4. 42–√m/s at 135^∘ from each body