The food in a camp lasts for 40 men for 50 days. If ten more men join, how many days will the food last?  Choose the correct answer
A) 20days B) 30days C) 40days D) 50days E) 60days
one man can consume the same food in 40*50= 
<gadget id="calculator">40*50</gadget>
<output>2_000</output>
2000 days.   10 more men join, the total number of men= 50   The number of days the food will last = 2000/50= 
<gadget id="calculator">2000/50</gadget>
<output>40</output>
40 days.   Answer: 40days
<result>C</result>
The food in a camp lasts for 40 men for 50 days. If ten more men join, how many days will the food last?