જો $\mathop {\rm{F}}\limits^ \to \, = \left( {\,4\hat i- 10\hat j\,} \right)$ અને $\mathop r\limits^ \to = \left( {\,5\hat i- 3\hat j\,} \right)$ હોય તો $\left( {\,\mathop \tau \limits^ \to = \mathop r\limits^ \to \times \mathop F\limits^ \to } \right)$ ની ગણતરી ... થાય
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