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A man first moves 3 m due east , them 6 m due north and finally 7 m due west , then the magnitude of the resultant displacement is (in metre)

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A man first moves 3 m due east , them 6 m due north and finally 7 m due west , then the magnitude of the resultant displacement is (in metre)
A. `sqrt(16)`
B. `sqrt(24)`
C. `sqrt(52)`
D. `sqrt(94)`
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Correct Answer - C
(c ) Resultant S `=3hati+6hatj-7hati=-4hati+6hatj`
`therefore|s|=sqrt(16+36)=sqrt(52m)`
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