A thin-walled brass container (coefficient of linear expansion αbrass=1.9×10−5K−1) is completely filled with an oil whose coefficient of cubical expansion is 7.5×10−4K−1 at 20∘C. The temperature of the system is raised by 40∘C. What percentage of the original volume of oil will overflow?
a) 3.0%
b) 1.4%
c) 2.8%
d) 2.9%