At what rate per cent per annum will the simple interest on Rs. $6720$ be Rs. $1911$ in $3$ years $3$ months?

7 \frac{3}{4} %

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8 \frac{3}{4} %

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10 \frac{1}{4} %

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11 \frac{2}{3} %

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Solution

The correct option is B $8 \frac{3}{4} %$
According to question, we have:
$6720 \times \frac{13}{4} \times \frac{r}{100} = 1911$
$\Rightarrow r = \frac{1911 \times 4 \times 100}{6720 \times 13}$
$\Rightarrow r = \frac{34}{4} = 8 \frac{3}{4} %$

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At what rate per cent per annum will the simple interest on Rs. 6720 be Rs. 1911 in 3 years 3 months?

The correct option is B 834%According to question, we have:6720×134×r100=1911⇒r=1911×4×1006720×13⇒r=344=834%

At what rate per cent per annum will the simple interest on Rs. $6720$ be Rs. $1911$ in $3$ years $3$ months?

The correct option is B $8 \frac{3}{4} %$
According to question, we have:
$6720 \times \frac{13}{4} \times \frac{r}{100} = 1911$
$\Rightarrow r = \frac{1911 \times 4 \times 100}{6720 \times 13}$
$\Rightarrow r = \frac{34}{4} = 8 \frac{3}{4} %$