Answer:
15 years
Step-by-step explanation:
Let Ishaan's age = x years
Ben is 4 times as old as Ishaan.
Hence, Ben's age is 4*x years
6 years ago,Ishaan's age was (x-6) years.
6 years ago,Ben's age was (4x-6) years.
6 years ago, ben was 6 times older than ishaan.
=> [tex]\[(4x-6) = 6*(x-6)\][/tex]
=> [tex]\[4x-6 = 6x-36\][/tex]
=> [tex]\[6x-4x = 36-6\][/tex]
=> [tex]\[2x = 30\][/tex]
=> [tex]\[x = \frac{30}{2}\][/tex]
=> [tex]\[x = 15\][/tex]
