A body of mass 1 kg, initially at rest, ...

A body of mass `1 kg`, initially at rest, explodes and breaks into three fragments of masses in the ratio `1:1:3`. The two pieces of equal mass fly off perpendicular to each other with a speed of `30 m//s` each. What is the velocity of the heavier fragment?

5 m/s

15 m/s

45 m/s

`5sqrt(2)` m/s

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