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Q.30 & $\begin{array}{l}\text { The figure shows a block of mass } m=20 \mathrm{~kg} \text { attached to a pair of identical linear } \\
\text { springs, each having a spring constant } k=1000 \mathrm{~N} / \mathrm{m} \text {. The block oscillates on a } \\
\text { frictionless horizontal surface. Assuming free vibrations, the time taken by the } \\
\text { block to complete ten oscillations is } \\
\text { decimal places) } \\
\text { Take } \pi=3.14 .\end{array}$
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