the efficiency of doing work of A is triple than B.hence,any work finished by A,60 days before than B.both together in how many days will finish the work? Choose the correct choice from the following answers.
A) 20 days B) 45/2 days C) 25 days D) 30 days E) 28 days
let any work finished by B in x days.A will take=(x-60) days   work of A in 1 days=3*(work of B in 1 days)   1/(x-60)=3*1/x,x=3(x-60),2x=180,x=90.   so,45/2 days take=90 days and A take=(90-60)= 
<gadget id="calculator">(90-60)</gadget>
<output>30</output>
30 days   (A+45/2 days) work in 1 days=(1/30+1/90)=4/90=2/45   so, together will finish work in 45/2 days   answer 45/2 days
<result>B</result>
the efficiency of doing work of A is triple than B.hence,any work finished by A,60 days before than B.both together in how many days will finish the work?