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?	Pick one.
A) 298  B) 608  C) 279  D) 280  E) 269
80* 7: x* 3 = 1:1 1/2   560: 3x = 2: 3   x = 280   Answer:280
<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?