In how much time an investment of Rs. 50,000 at the rate of 5% simple interest would be doubled, if the interest is added to the principal amount after every 10 years
1
\(\rm 16 \frac{2}{3} \ years\)
2
\(\rm15 \frac{2}{3}\ years\)
3
\(\rm17 \frac{2}{3}\ years\)
4
\(\rm 18 \frac{2}{3}\ years\)