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# Algebra/related to unitary method

Question
In a camp, 120 men has food for 200 days. After 5 days, 30 men left the camp. how many days food is for?

Hello Niketan,

Sorry for my delay...somehow I missed your question until today!

Anyhow...

For the sake of convenience, let's say each man needs one unit of food per day.
Thus, for 120 men over 200 days, 120*200 = 24,000 units of food are needed.
So, we start with 24,000 units of food.  After 5 days, 5*120 = 600 units of food
have been consumed, leaving 23,400 units for the remaining 90 men (after 30 leave).

23,400 units divided by 90 men gives 260.  Hence, 260 days of food for the remaining
men.

Abe

Questioner's Rating
 Rating(1-10) Knowledgeability = 10 Clarity of Response = 10 Politeness = 10 Comment THANX ABE

Algebra

Volunteer

#### Abe Mantell

##### Expertise

Hello, I am a college professor of mathematics and regularly teach all levels from elementary mathematics through differential equations, and would be happy to assist anyone with such questions!

##### Experience

Over 15 years teaching at the college level.

Organizations
NCTM, NYSMATYC, AMATYC, MAA, NYSUT, AFT.

Education/Credentials
B.S. in Mathematics from Rensselaer Polytechnic Institute
M.S. (and A.B.D.) in Applied Mathematics from SUNY @ Stony Brook