Question

For same work A takes 6 hrs less than B . If together they took 13hrs 20 minutes . what will be the time taken alone by B to complete work?

Answer 1

let work done by b be x
work done by a would be x+6
1/x+1/x+6=1/13hour 20 min
convert all hour unit into minutes
time taken by a would be x+360
work done by both would be in one day=1/800
1/x+1/x+300+1/800
work done by b would be 4/6 hours
as there is total 800 min work done by a is 360 min more
both the x are same so 800/2=400-360 min=40 time taken by b to do the work would be 20 hours THIS PROCEDURE IS WRONG AND THE ANSWER IS AROUND 24.5 OR CLOSE TO IT WHEN EVER I WILL GET TO SOLVE IT I WILL EDIT MY ANSWER