At simple interest,the sum rs 800 become rs 956 in three years.if the rate of interest is increased by 3%,how much would rs 800 become in three years?
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S.I. = 956 - 800 = Rs 156
\begin{aligned}
R = \frac{156*100}{800*3} \\
R = 6\frac{1}{2}\% \\
\text{ New Rate = }6\frac{1}{2}+4 \\
= \frac{21}{2} \% \\
\text{ New S.I. = }800\times\frac{21}{2}\times{3}{100} \\
= 252
\end{aligned}
Now amount will be 800 + 252 = 1052
\begin{aligned}
R = \frac{156*100}{800*3} \\
R = 6\frac{1}{2}\% \\
\text{ New Rate = }6\frac{1}{2}+4 \\
= \frac{21}{2} \% \\
\text{ New S.I. = }800\times\frac{21}{2}\times{3}{100} \\
= 252
\end{aligned}
Now amount will be 800 + 252 = 1052
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