A starts a business with a capital of Rs. 85,000. B joins in the business with Rs.42500 after some time. For how much period does B join, if the profits at the end of the year are divided in the ratio of 3 : 1?
5 months
6 months
7 months
8 months
Explanation:
Let B joined for X months. Then
85000×12:42500×X=3:1
850×12:425X=3:1
850×12×1=3×425X
850×4=425X
X=8