Final answer:
The first son would receive RS4320, while the second son would receive RS2880 after dividing RS7200 in the ratio 3:2.
Step-by-step explanation:
If Rajaram divided the interest of RS7200 between his two sons in the ratio 3:2, we first need to calculate the total parts into which the amount is divided, which is 3 + 2 = 5 parts. Then we determine the value of each part by dividing the total interest by the number of parts: RS7200 / 5 = RS1440 per part. Now, we find out how much each son would get by multiplying the value of each part with the number of parts allocated to each son. For the first son, we multiply 3 parts by RS1440, which equals RS4320. For the second son, we multiply 2 parts by RS1440, which equals RS2880.