A began a business with Rs. 85,000. He was joined afterwards by B with Ks. 42,500. For how much period does B join, if the profits at the end of the year are divided in the ratio of 6 : 1 ?  Pick:
A) 6 months	B) 4 months	C) 2 months	D) 8 months	E) 9 months
Suppose B joined for x months . Then, ( 85000 * 12 )/(42500 * x) = 6. or x = (85000 * 12) / (42500 * 6)= 
<gadget id="calculator">(85000 * 12) / (42500 * 6)</gadget>
<output>4</output>
4.   So, B joined for 4 months.   Answer: 4 months
<result>B</result>
A began a business with Rs. 85,000. He was joined afterwards by B with Ks. 42,500. For how much period does B join, if the profits at the end of the year are divided in the ratio of 6 : 1 ?