Question

1 Solve
a find the
amount and the compound interest on rs 6400at the scale of 12.5 for 2 years
​

Answer 1

SOLUTION...

GIVEN...

$principal \: (p) \: = Rs.6400 \\ rate \: (r) = Rs.12.5\%p.a \\ time(t) = 2 \: years$

EXPLANATION...

$amount = p (1 + \frac{r}{100} ) {}^{n} \\ = 6400(1 + \frac{12.5}{100} ) {}^{2} \\ = 6400(1 + \frac{125}{1000} ) {}^{2} \\ = 6400( \frac{1125}{1000} ) \\ = 6400 \times \frac{1125}{1000} \times \frac{1125}{1000} \\ = \frac{8100000000}{1000000} \\ = 8100 \\ amount = rs.8100$

$c.i. = a - p \\ = 8100 - 6400 \\ = 1700 \\ \\ compound \: interest = rs.1700$

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