At which percent per annum simple interest will double a sum of money in 12 years?

8 \frac{1}{3} %

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24 %

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\frac{25}{4} %

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8.25 %

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Solution

The correct option is B $8 \frac{1}{3} %$
Let,
Principle P = 100
Amount A = 200
Time T = 12 years
Interest = Rs. 100
Rate of Interest = $\frac{(I n t e r e s t)}{T i m e}$ = $\frac{100}{12}$ = $\frac{25}{3}$ = 8 $\frac{1}{3}$ %
Option A is correct

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Q. At what rate per cent per annum simple interest will a sum double itself in 12 years?

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At which percent per annum simple interest will double a sum of money in 12 years?

The correct option is B 813%Let,Principle P = 100Amount A = 200Time T = 12 yearsInterest = Rs. 100Rate of Interest = (Interest)Time = 10012 = 253 = 813%Option A is correct

The correct option is B $8 \frac{1}{3} %$
Let,
Principle P = 100
Amount A = 200
Time T = 12 years
Interest = Rs. 100
Rate of Interest = $\frac{(I n t e r e s t)}{T i m e}$ = $\frac{100}{12}$ = $\frac{25}{3}$ = 8 $\frac{1}{3}$ %
Option A is correct