A plant virus is found to consist of uniform cylindrical particles of 150A in diameter and 5000A long.The specific volume of the virus is $0.75cm^3/g$.If the virus is considered to be a single particle and its molecular weight

Question

$\begin{array}{1 1}(a)\;6\times 10^7&(b)\;7.095\times 10^7\\(c)\;5.095\times 10^7&(d)\;9\end{array}$