TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: the average weight of a , b and c is 60 kg . if the average weight of a and b be 70 kg and that of b and c be 50 kg , then the weight of b is :

SOLUTION: 60 kg

PROBLEM: Problem: a , b and c start a business each investing 20,000 . after 5 months a withdrew 5000 , b withdrew 4000 and c invests 6000 more . at the end of the year , a total profit of 69,900 was recorded . find the share of b .

SOLUTION: 28,200

PROBLEM: Problem: if the radius of a cylinder is made 3 times and height is doubled , what is the new volume of the cylinder divided by the old one ?

SOLUTION:
18 .