Question

A and B can do a piece of work in 6days and 4days respectively. A Started the work at it for 2day and then was joined by B. find the total time taken to complete the work.​

Answer 1

Answer:

i think its 3.6

Step-by-step explanation:

let work=1

work done by A per day=1/6

simlrly for B its=1/4

if x is the total days to finish work then A does it all x days...while B only x-2 days

so 1=x/6. +(x-2)/4