Question

A started a business with Rs.21,000 and is joined afterwards by B with Rs.36,000. After how many months did B join if the profits at the end of the year are divided equally?
A.4
B.5
C.6
D.7

Answer 1

the ratio of share between the two of will be 21000*12/36000*x::1:1
ie cancelling three zeros we have
21*12=36*x
then x=7months

Answer 2

Answer:

B joined after 5 months.

Step-by-step explanation:

Let B join after x months.

∴21000×12=36000×(12−x)

252000=36000×12−36000x

36000x=432000−252000

36000x=180000

36x=180

x=  180/36 = 5

Hence B joined after 5 months.