1.

In `Q.28`, the average velocity during the journey is :A. `(-6 hat i+ 9 hat j) km//h`.B. `(-6 hat i+ 8 hat j) km//h`C. `(-9 hat i+ 12 hat j) km//h`D. None of these

Answer» Correct Answer - B
Average velocity,
`ltvgt = (bar r)/(t) = ((-3 hat i+ 4 hat j)km)/((30//60)hr)`
=`(-6 hat i+ 8 hat j) km//h`.


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