The task is to generate the correct answer for a given math 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 ?
300

Problem: after decreasing 24 % in the price of an article costs rs . 684 . find the actual cost of an article ?
900

Problem: the average of 15 numbers is calculated as 30 . it is discovered later on that while calculating the average , one number namely 36 was wrongly read as 26 . the correct average is ?

45