A person divided his total amount into two parts in the
ratio of 3:2. He invested the first part in a bank which
gives simple interest at the rate of 10% pa and the second
part in another bank which gives simple interest at the
rate of 20%. If after 3 years the total interest received by
him from both the banks is 42% of the total amount he
deposited in both the banks together, what is the total
amount he deposited?

Question

A person divided his total amount into two parts in the 
ratio of 3:2. He invested the first part in a bank which 
gives simple interest at the rate of 10% pa and the second 
part in another bank which gives simple interest at the 
rate of 20%. If after 3 years the total interest received by 
him from both the banks is 42% of the total amount he 
deposited in both the banks together, what is the total 
amount he deposited?