Question

) If compound interest is ₹ 1890. Principal = ₹ 9000, then amount is _______

Answer 1

Answer:

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Step-by-step explanation:

Given Compound interest= 1890, Principal = 9000, Rate r = 10 years.

We know that CI = A - P

1890 = A - 9000

1890 + 9000 = A

10890 = A.

Now,

We know that A = P(1 + r/100)^n

= > 10890 = 9000(1 + 10/100)^n

= > 10890/9000 = (110/100)^n

= > (1.21) = (1.1)^n

= > (1.1)^2 = (1.1)^n

= > n = 2 .

Therefore, the number of years = 2.