Discussion Forum

A certain amount earns SI of Rs. 1,750 after 7 years. Had the interest been 2% more, how much more interest would it have earned ?

Answer:

Explanation:

$SI$ $=\frac{(P\times R\times N)}{100}$ $\Rightarrow\frac{(P\times R\times 7)}{100}$  $=1750$

$\Rightarrow PR$ $= 25000$

$SI$ $=\frac{(P\times (R+2)\times 7)}{100}$         

Given  $\left\{\frac{(P\times (R+2)\times 7)}{100}\right\}$ $-\left\{\frac{(PR\times 7)}{100}\right\}$ $=SI-1750$

We have 1 equation in 2 variables. $\therefore$ R and P cannot determined.