Verified answer

Answer:

For 64 days

Step-by-step explanation:

hey have sufficient food for 320 soldiers for 80 days.

So, There are  man-days of food available.

After 20 days 320 soldiers have consumed  man-days of food.

So, Man-days remain are 25600-6400= 19200

But 20 soldiers left from 320=300 soldiers left.

Let x be the number of days the food will last now.

Now,

300x = 19200

x = 19200/300

x = 64

Therefore, For 64 days will the food last