A) 4 months
B) 5 months
C) 6 months
D) 7 months
Correct Answer: D
Solution :
[d] Suppose B remained in the business for x months. Then, \[A:B=(4500\times 12):(5400\times x)\] = (54000 : 5400x) = (10 : x) \[\therefore \] \[\frac{10}{x}=\frac{2}{1}\]\[\Rightarrow \]\[2x=10\]\[\Rightarrow \]\[x=5\] Thus, B remained in the business for 5 months. So, B joined the business after 7 months. |
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