We have loaded Previous years questions with explanations...for all competitive exams
Like and Follow us on Facebook and Google+ for latest updates...
This Site can be best viewed in Mozilla or Internet Explorer.
'A' alone can do a certain job in 15 days while B alone can do it in 10 days. 'A' started the work and was joined by B after 5 days. For how long did this work last?
None of these
According to the question,
In 5 days A can complete=115×5=13rd of the work
Remaining work =1-13=23
In one day (A+B) can complete=115+110=2+330=530=16th of the work
∴ 23 rd of the work will be finished by (A+B) in 23×6 days that is in 4 days.
∴ Total time taken= (5+4) days =9 days.
Hence option D is the correct
For more Short tricks and formulae click
Work and Time
- Share with your friends! -