The food in a camp lasts for 10 men for 20 days. If 30 more men join, how many days will the food last? Options:
A) 8 days
B) 4 days
C) 5 days
D) 10 days
E) 17 days
one man can consume the same food in 10*20= 
<gadget id="calculator">10*20</gadget>
<output>200</output>
200 days.   30 more men join, the total number of men= 40   The number of days the food will last = 200/40= 
<gadget id="calculator">200/40</gadget>
<output>5</output>
5 days.   Answer:5 days
<result>C</result>
The food in a camp lasts for 10 men for 20 days. If 30 more men join, how many days will the food last?