A began business with Rs.45000 and was joined afterwards by B with Rs.5400. 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) 6	B) 0	C) 7	D) 5	E) 4
45*12 : 54*x = 2: 1   x = 5   12 -5= 
<gadget id="calculator">12 -5</gadget>
<output>7</output>
7   Answer:7
<result>C</result>
A began business with Rs.45000 and was joined afterwards by B with Rs.5400. When did B join if the profits at the end of the year were divided in the ratio of 2:1?