A proton is accelerated to one tenth of the velocity of light. Suppose velocity can be measured with a precision of $\pm1\%$, what can be the uncertainity in its position?

Question

$(a)\;1.05\times10^{-10}m\qquad(b)\;2.3\times10^{-13}m\qquad(c)\;1.3\times10^{-9}m\qquad(d)\;1.05\times10^{-13}m$