Solve this:
Example 7. 120 men had food provision for 200 days. After 5 days, 30 men died due to an epidemic. How long will the remaining food last?

Dear Student,

Initially,
Food lasts for 200 days for 120 people

After 5 Days
food lasts for (200-5) days for 120 people

But when 30 people die

food lasts for
 $\frac{120\times (200-5)}{120-30}=\frac{120\times 195}{90}=4\times 65=\boxed{260 days}$
for rest of the 90 people.

Hope this information will clear your doubts about topic.       

If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.       

Keep posting!!       

Regards