The food in a camp lasts for 30 men for 40 days. If ten more men join, how many days will the food last?	Pick:  A) 11  B) 30  C) 99  D) 88  E) 61
one man can consume the same food in 30*40= 
<gadget id="calculator">30*40</gadget>
<output>1_200</output>
1200 days.   10 more men join, the total number of men= 40   The number of days the food will last = 1200/40= 
<gadget id="calculator">1200/40</gadget>
<output>30</output>
30 days.   Answer: 30
<result>B</result>
The food in a camp lasts for 30 men for 40 days. If ten more men join, how many days will the food last?