A began business with Rs.36000 and was joined afterwards by B with Rs.54000. When did B join if the profits at the end of the year were divided in the ratio of 2:1?	Choose the correct choice from the following answers
A) 1
B) 6
C) 7
D) 8
E) 2

Rationale: "36 * 12 : 54 * x = 2 : 1 x = 4 12 - 4 = 8 answer : d"
Answer: D