A merchant invests a certain sum and his annual gain percent is 25. If at the end of the third year, his capital is Rs. 10000, then the amount invested by him is equal to 


(a) 
Rs. 5120 
(b) 
Rs. 5210 
(c) 
Rs. 5500 
(d) 
Rs. 5714 
A merchant invests a certain sum and his annual gain percent is 25. If at the end of the third year, his capital is Rs. 10000, then the amount invested by him is equal to 


(a) 
Rs. 5120 
(b) 
Rs. 5210 
(c) 
Rs. 5500 
(d) 
Rs. 5714 