Mr. Kaushik invested ₹1,00,000 in a bank that offers a simple interest rate of 10% per annum. After how many years will his investment triple?

To find out when Mr. Kaushik's investment will triple, we need to use the formula for simple interest, which is:

I = PRT/100

Where: I = Interest P = Principal amount (the initial amount of money) R = Rate of interest T = Time period

In this case, we know that the principal amount (P) is ₹1,00,000 and the rate of interest (R) is 10% per annum. We want to find out when the investment will triple, which means the total amount will be ₹3,00,000. Therefore, the interest (I) will be ₹3,00,000 - ₹1,00,000 = ₹2,00,000.

We can now substitute these values into the formula and solve for T (time):

2,00,000 = 1,00,000 * 10 * T / 100

Solving for T gives:

T = 2,00,000 * 100 / (1,00,000 * 10)

T = 20 years

So, Mr. Kaushik's investment will triple in 20 years.