A and B rent a pasture for 10 months. A put in 80 cows for 7 months. How many can B put in for the remaining 3 months, if he pays half as much again as A?  Choices
A) 2: 5
B) 2: 0
C) 2: 2
D) 2: 3
E) 2: 9
80* 7: x* 3 = 1:1 1/2   560: 3x = 2: 3   x = 280.Answer: 2: 3
<result>D</result>
A and B rent a pasture for 10 months. A put in 80 cows for 7 months. How many can B put in for the remaining 3 months, if he pays half as much again as A?