Hi,

For the question attached, the multiple choice answers are $\displaystyle 60, 70, 80, 90, 100$. I have tried:

$\displaystyle W_{1}/T_{1}=0.6, W_{2}/T_{2}=3/20$, and $\displaystyle [W_{1} + W_{2}]/[T_{1} + T_{2}]=0.5$. I can't get a numerical answer in $\displaystyle T_{1} + T_{2}$.

Thanks