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Q)

A body travels 2 m in the first two seconds and $2.2 \;m$ in the next four seconds. What will be its velocity at the end of the seventh second from the start, if acceleration is constant .

$\begin{array}{1 1}(A)\;0.30ms^{-1}\\(B)\;0.10ms^{-1} \\(C)\;0.9 ms^{-1} \\(D)\;6.7 ms^{-1} \end{array} $

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