Question

9000 rupees become 18000 at simple interest in 8 years find the rate parcent per annum​

Answer 1

Answer:

R = 25/2 % or 12.5 % per annum.

Step-by-step explanation:

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Answer 2

GIVEN :

• Principal = ₹9000
• Time = 8 years
• Amount = ₹18000

To find :

Rate percentage per annum

Formula used :

1. A = P + I
2. I = Prt

Here ,

• A = Amount
• I = Interest
• P = Principal
• r = rate
• t = time

Solution :

First of all we need to find interest

I = A - P

I = 18000 - 9000

I = ₹ 9000

I = Prt

Therefore,

$\sf \implies \: 9000\:=\: 9000 \times \bigg( \dfrac{r}{100} \bigg)\times 8 \\ \\ \sf \implies \: r \: = \: \dfrac{9000 \times 100}{9000 \times 8} \\ \\ \sf \implies \: r \: = \: \dfrac{100}{8} \\ \\ \sf \implies \: r \: = 12.5\%$

Answer :

Rate = 12.5% p.a.