The task is to generate the correct answer for a given math problem.

Problem: if a - b = 6 and a 2 + b 2 = 50 , find the value of ab .
a ) 7

Problem: a train 360 m long runs with a speed of 45 km / hr . what time will it take to pass a platform of 150 m long ?
40.8 sec

Problem: two numbers are in the ratio of 1 : 2 . if 6 be added to both , their ratio changes to 3 : 5 . the greater number is

24