Discussion Forum

Rs.1000 is invested at 5% per annum simple interest. If the interest is added to the principal after every 10 years, the amount will becomes Rs2000 after

Answer:

Explanation:

After $10$ years, $SI$ $= \frac{(1000\times 5\times 10)}{100}$ = Rs.500

Principal for $11^{th}$ Year $=1000+500$ = 1500

$SI$ $=2000-1500$ = Rs.500

$T$ $=\frac{(100\times SI)}{P\times R}$

$=\frac{ 500\times 100}{1500\times 5}$

$=6\frac{2}{3}$ Yrs.

Total time $=10+6\frac{2}{3}$ $=16\frac{2}{3}$ Yrs