A, B and C enter into a partnership with. a capital in,which A’s contribution is ,Rs. 10000 . If out, of a profit of Rs. 1000, A gets Rs. 500 and B gets Rs. 300, then,C's capital is :

1) Rs. 4000

2) Its. 6000

3) Rs. 8000 .

4) Rs. 10000

A sum of money invested at compound interest amounts to Rs. 800 in 3 years arid Rs. 840 in 4 years. What is the rate of interest per annum ?

1) 2%

2) 4%

3) 5%

4) 10%