Question

Find the principal if the difference between C.I and S.I on it at 15% p.a for 3 years i
1134​

Answer 1

Answer:

use the formula P×R×T over 100

Answer 2

If  the difference between C.I and S.I on it at 15% p.a for 3 years i s 1134 then the value of principal is 16000

Solution:

Given that difference between C.I and S.I is 1134

Rate of interest, r = 15%

Number of years = 3

Principal = ?

The formula for difference between S.I and C.I for 3 years is given as:

$\text { C.I }-\text { S.I }=\mathrm{p}\left(\frac{\mathrm{r}}{100}\right)^{2}\left[3+\frac{\mathrm{r}}{100}\right]$

By substituting the values we get,

$\begin{array}{l}{1134=p\left(\frac{15}{100}\right)^{2}\left[3+\frac{15}{100}\right]} \\\\ {1134=p \times 0.0225 \times 3.15} \\\\ {p=\frac{1134}{3.15 \times 0.0225}=16000}\end{array}$

Hence the value of principal is 16000

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