A body travels uniformly a distance of $ (13.8 \pm 0.2) m$ in a time $(4.0 \pm 0.3)\, s$. The velocity of the body within error limits is

  • A

    $(3.45 \pm 0.2) ms^{-1}$

  • B

    $(3.45 \pm 0.3) ms^{-1}$

  • C

    $(3.45 \pm 0.4) ms^{-1}$

  • D

    $(3.45 \pm 0.5) ms^{-1}$

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A student determined Young's Modulus of elasticity using the formula $Y=\frac{M g L^{3}}{4 b d^{3} \delta} .$ The value of $g$ is taken to be $9.8 \,{m} / {s}^{2}$, without any significant error, his observation are as following.

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