correct answer is: c) 2 years 3 months

Explanation

Here,
Principal (p) = Rs 10000
Rate = 8 %
S.I. = Rs 1800
Let, Time = ‘t’
We know,
S.I. =\frac{p\times r\times t}{100}
Or, t =\frac{S.I.\times100}{p\times r}
So, put the value, we get:
t =\frac{1800\times100}{10000\times8}
\rightarrow t =2.25 years
\therefore Time = 2.25 years or 2 years 3 months.
Ans: In 2 years 3 months the simple interest on Rs 10000 at 8% rate of interest will become Rs 1800.

An alternative phrasing for this particular query is:
1. Calculate the time needed for the simple interest on Rs 10000 at an 8% interest rate to reach Rs 1800.
2. Find out how many years it takes for the simple interest on Rs 10000 at 8% interest to become Rs 1800.
3. Determine the duration required for the simple interest on Rs 10000 to accumulate to Rs 1800 at an 8% interest rate.
4. In how many years will the simple interest on Rs 10000 at an 8% interest rate amount to Rs 1800?
5. Calculate the time it takes for the simple interest on Rs 10000 at an 8% interest rate to reach Rs 1800.