Question

please answer this question

Answer 1

Answer:

4 years is the right answer

Answer 2

Answer:

Given

• Principal = p = 900rs.
• Interest = S. I. = 180rs.
• Rate of interest = r =5% per annum

To find

• Time period = t

Solution

$simple \: interest \: (s.i.)= \frac{p \times r \times t}{100}$

Substituting the value of p, r and S. I.

$180 = \frac{900 \times 5 \times t}{100} \\ 180 \times 100 = 900 \times 5 \times t \\ \\ \frac{18000}{900 \times 5} = t \\ \\ t = \frac{20}{5} \\ \\ t = 4 \: years$

So, 900rs. will take 4 years to yield an interest of 180rs. by the rate of 5% per annum.