Question 3

Spectrum HQ has been surrounded and there is no way to bring in more food. The trapped agents will have to survive on what they’ve got inside. 40 agents would have enough food for 20 days. 30 agents would have enough food for 30 days. How long will the food sustain 25 agents?

get the answer? get the answer?
Clue?
This may be a hard gaft but don't lose the plot, draw the line.