If uncertainties in the measurement of position and momentum of an electron are equal,calculate uncertainty in the measurement of velocity.

Question

$\begin{array}{1 1}(a)\;6.634\times 10^{12}ms^{-1}&(b)\;7.2\times 10^{11}ms^{-1}\\(c)\;7.98\times 10^{12}ms^{-1}&(d)\;7.98\times 10^{10}ms^{-1}\end{array}$