A man bring 2 cats to his home to eliminate all the mice. They do a half of the work in 5 days, then the man brings 3 more cats. If they hunt at the same rate, how many days will take to hunt all the mice, since the first day? Answers:
A) 7 days
B) 8 days
C) 9 days
D) 10 days
E) 11 days
We have that: 2 cats----- 5 days, (2+3) C ----- X d, that is: (X d/ 2C) = (5 d/5P), then: X d = (5 d/5C)2C = 2d. Is to say, the 5 cats hunt the same quantity in 2 days; as it is only 1/2 of the work, all the mice would be hunt in: M = 5 d + 2 d = 7 days. 7 daysnswer 7 days.
<result>A</result>
A man bring 2 cats to his home to eliminate all the mice. They do a half of the work in 5 days, then the man brings 3 more cats. If they hunt at the same rate, how many days will take to hunt all the mice, since the first day?