A garrison of 400 men had a provision for 31 days. After 28 days 280 persons re-enforcement leave the garrison. Find the number of days for which the remaining ration will be sufficient?	Choose the correct choice from the following answers
A) 16 days	B) 34 days	C) 10 days	D) 16 days	E) 15 days
400 --- 31   400 --- 3   120 --- ?   400*3 = 120*x =&gt; x   =10 days   Answer: 10 days
<result>C</result>
A garrison of 400 men had a provision for 31 days. After 28 days 280 persons re-enforcement leave the garrison. Find the number of days for which the remaining ration will be sufficient?