A began a business with Rs. 85,000. He was joined afterwards by B with Ks. 40,000. For how much period does B join, if the profits at the end of the year are divided in the ratio of 3 : 1 ?
Choices.
A) 6.5 months
B) 3.5 months
C) 2.5 months
D) 8.5 months
E) 9.5 months
Suppose B joined for x months . Then, ( 85000 * 12 )/(40000 * x) = 3. or x = (85000 * 12) / (40000 * 3)= 
<gadget id="calculator">(85000 * 12) / (40000 * 3)</gadget>
<output>17/2 = around 8.5</output>
8.5   So, B joined for 8.5 months.   Answer: 8.5 months
<result>D</result>
A began a business with Rs. 85,000. He was joined afterwards by B with Ks. 40,000. For how much period does B join, if the profits at the end of the year are divided in the ratio of 3 : 1 ?