A and B enter into partnership with capital as 7:9. At the end of 8 months, A withdraws. If they receive the profits in the ratio of 8:9 find how long B's capital was used?	Choose the correct choice:
A) 6
B) 5
C) 4
D) 7
E) 9
7 * 8 : 9 * x = 8:9 =&gt; x= 7   Answer: 7
<result>D</result>
A and B enter into partnership with capital as 7:9. At the end of 8 months, A withdraws. If they receive the profits in the ratio of 8:9 find how long B's capital was used?