3 buffaloes eat as much as 4 cows or 2 oxen. At a farm, there are 15 buffaloes, 8 oxen, and 24 cows. The fodder for these cattle is available for 24 days. If 40 more cows and 15 more buffaloes are brought in, how many days will the fodder last?  Choices:	A) 10	B) 12	C) 15	D) 18	E) 21
2 oxen = 3 buffaloes = 4 cows   Also: 15 buffaloes + 8 oxen + 24 cows   = 10 oxen + 8 oxen + 12 oxen = 30 oxen   There is enough fodder for 1 oxen for 30*24 days.   40 cows + 15 buffaloes = 20 oxen + 10 oxen = 30 oxen   The new total is equal to 60 oxen instead of 30 oxen.   30*24 / 60= 
<gadget id="calculator">30*24 / 60</gadget>
<output>12</output>
12 days   The answer is 12.
<result>B</result>
3 buffaloes eat as much as 4 cows or 2 oxen. At a farm, there are 15 buffaloes, 8 oxen, and 24 cows. The fodder for these cattle is available for 24 days. If 40 more cows and 15 more buffaloes are brought in, how many days will the fodder last?