TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a farmer with 1,350 acres of land had planted his fields with corn , sugar cane , and tobacco in the ratio of 5 : 2 : 2 , respectively , but he wanted to make more money , so he shifted the ratio to 2 : 3 : 4 , respectively . how many more acres of land were planted with tobacco under the new system ?

SOLUTION: 300

PROBLEM: Problem: two pipes can fill the cistern in 10 hr and 12 hr respectively , while the third empty it in 30 hr . if all pipes are opened simultaneously , then the cistern will be filled in

SOLUTION: 6.67 hr

PROBLEM: Problem: in one hour , a boat goes 11 km along the stream and 5 km against the stream . the speed of the boat in still water is :

SOLUTION:
8