Find the rate at simple interest, at which a sum becomes 5 times of itself in 15 years.

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Solution

The correct option is A $27$ %
$S I = \frac{P \times R \times T}{100}$ , ${S I}_{t + 15} = \frac{P \times R \times T + 15}{100}$
Let sum= $x$ , Then $S I = 4 x$
Rate $= \frac{100 \times S I}{P \times T} = \frac{100 \times 4 x}{15} = \frac{400}{15} = 26.66$ %

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Find the rate at simple interest, at which a sum becomes 5 times of itself in 15 years.

The correct option is A 27%SI=P×R×T100, SIt+15=P×R×T+15100Let sum= x, Then SI=4xRate=100×SIP×T=100×4x15=40015=26.66%

The correct option is A $27$ %
$S I = \frac{P \times R \times T}{100}$ , ${S I}_{t + 15} = \frac{P \times R \times T + 15}{100}$
Let sum= $x$ , Then $S I = 4 x$
Rate $= \frac{100 \times S I}{P \times T} = \frac{100 \times 4 x}{15} = \frac{400}{15} = 26.66$ %