Given information:
- Principal amount: not given
- Rate of interest: 6% per annum
- Interest earned: ₹300

Calculating the principal amount:
To find the principal amount, we can use the formula:

Interest = (Principal * Rate * Time)/100

Given that the interest earned is ₹300 and the rate of interest is 6% per annum, we can substitute these values into the formula:

300 = (Principal * 6 * 1)/100

Simplifying the equation:

300 = 0.06 * Principal

Dividing both sides by 0.06:

Principal = 300/0.06

Principal = ₹5000

Therefore, the principal amount is ₹5000.

Calculating the interest at 5% per annum:
To find the interest on the same principal amount at a different rate (5% per annum), we can again use the formula:

Interest = (Principal * Rate * Time)/100

Given that the principal amount is ₹5000 and the rate of interest is 5% per annum, we can substitute these values into the formula:

Interest = (5000 * 5 * 1)/100

Simplifying the equation:

Interest = 25000/100

Interest = ₹250

Therefore, the interest on the same principal amount at 5% per annum for the same period is ₹250.

Explanation:
- The given problem involves finding the interest on a certain sum at two different rates of interest for the same period.
- We start by calculating the principal amount using the given interest and rate of interest (6%).
- Using the formula for calculating interest, we substitute the principal amount, rate of interest (5%), and the time period (1 year) to find the interest at 5% per annum.
- The principal amount is ₹5000, and the interest at 5% per annum is ₹250.
- This means that if the same sum of ₹5000 is invested at a rate of 5% per annum for the same period, the interest earned will be ₹250.

Hard