Ranjit lent to Sujit Rs. 600 far 2 years and Rs. 150 to Alak far 4 years and received fram bath Rs. 90 as total interest.Interest being simple, the rate ,of interest charged per annum was  -

1)  12%

2)  6%

3)  5%

4)  2%

Sanjay and Komal started a business investing Rs. 15,000 each. After 8 months 'Komal withdrew Rs. 10,000 from his share. If they get Rs. 32,000 as profit at the end of the year, how much share of profit should Sanjay get?

(I) Rs. 18000

(2) Rs. 16000

(3) Rs. 12800

(4) Rs. 19200

If the amount is 2 ¼  times the sum after 2 years at compound interest, the rate of interest per annum is :

1) 25%

2) 30%

3) 40%

4) 50%