Quantitative Aptitude Ques 2268
Question: A is thrice as good a workman as B and therefore, able to finish a job in 60 days less than B. Working together they will do it in
Options:
A) 20 days
B) $ 22\frac{1}{2}days $
C) 25 days
D) 30 days
Show Answer
Answer:
Correct Answer: B
Solution:
- A is thrice as efficient as B. Then, if B takes 3x days, then A can do this in x days. Now, $ 3x-x=60 $
$ \Rightarrow $ $ 2x=60 $
$ \Rightarrow $ $ x=30,days $
$ \therefore $ $ 3x=90days $
$ \therefore $ Working together they can finish the job in $ =\frac{30\times 90}{30+90}=\frac{2700}{120}=22.5,days $
BETA
