A truck travelling due north at $20 \,m/s $ turns west and travels at the same speed. The change in its velocity be
- A$40\, m/s \,N-W$
- B$20\sqrt 2 \, m/s\, N-W$
- C$40\, m/s\, S-W$
- D$20\sqrt 2 \,m/s \,S-W$
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- [JEE MAIN 2020]
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