Example 22 a, b 22: a, b and c have 40, x and y balls with them respectively. if b gives 20 balls to a, he is left with half halls as c. if together they had 60

Example 22 A, B 22: A, B and C have 40, X and y balls with them respectively. If B gives 20 balls to A, he is left with half halls as C. If together they had 60 more balls, each of them would have had 100 balls on an average Wha is value of x : y ? (A) 3 2 (B) 4:6 (C) 2: 1 (D) 3: 4