Question

15. ... Interest on a certain a sum of money invested at
5% interest amounts to 105 for second year, find
the amount invested ?​

Answer 1

Answer:

100 (unit)

Step-by-step explanation:

P = ?

A = 105

R = 5% p.a

T = 2yrs

In case of CI :

A = $P*(1 +\frac{R}{100})$ ^n

105 = $P * (1+\frac{5}{100} )^{2}$

105 = P * 21/20 * 21/20

P = 105 * $\frac{20}{21} * \frac{20}{21}$

Therefore, P = 100 rs.