Question

If a sum of amount double in 9 years then the rate of interest per annum is
(A) 9 1/9 %
(B) 10 1/9 %
(C) 11 1/9%
(D) 12 1/9%​

Answer 1

Answer:

$let \: sum \: be \: x \\ amount \: be \: 2x \\ s.i = 2x - x = x \\time = 9yrs . \\ rate = \frac{x \times 100}{9 \times x} = \frac{100}{9} \% = 11 \frac{1}{9} \% \\ anssssssssssssssss$

Step-by-step explanation:

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