Incorrect. Let $\displaystyle{t}=\usepackage{cmbright}\Huge\$ Albert's time, in minutes, to eat a platter of hot dogs. Then $\displaystyle{2}{t}=\usepackage{cmbright}\Huge\$ Lester's time to eat a platter of hot dogs. So their rates are $\displaystyle\frac{{1}}{{t}}\usepackage{cmbright}\Huge\$ and $\displaystyle\frac{{1}}{{{2}{t}}}\usepackage{cmbright}\Huge\$ platters per minute. Use this to find their combined rate. Then set up an equation using the fact that rate times time equals amount of work done. Solve for t, then find $\displaystyle{2}{t}\usepackage{cmbright}\Huge\$ . The correct answer is 30.