To solve this problem, we need to equate the simple interest earned by each son. Let the amounts invested for Rohan, Sohan, and Mohan be P1,P2, and P3 respectively.
1. Recall the Simple Interest formula:
The formula for Simple Interest is:
SI=100P×R×T
2. Set up the equation:
We are given that the interest received is the same for all three sons, and the rate (R) is 5% for all. Let T1=2 years, T2=3 years, and T3=4 years.
100P1×5×2=100P2×5×3=100P3×5×4
3. Simplify the equation:
Since the rate (5) and the denominator (100) are common to all parts, they cancel out:
2P1=3P2=4P3
4. Determine the ratio:
To find the ratio P1:P2:P3, we find the Least Common Multiple (LCM) of the coefficients 2,3, and 4, which is 12. Now, divide the entire equation by 12:
122P1=123P2=124P3
This simplifies to:
6P1=4P2=3P3
Thus, the ratio P1:P2:P3 is 6 : 4 : 3.
Correct Answer: Option 3