4Â years, 4Â months ago
4Â years, 4Â months ago
19 days
number of days taken by A is 16 and B is 24
let total work be 48 units then the efficiency of A is 3 and B is 2
if they work on alternate days then in 2 days 5 units will be completed hence in 18 days 45 units will be completed and A will work on last days to complete last 3 units and make it 48 units.
4Â years, 4Â months ago
Answer is 19 days
Let number of days taken by A be X
So, number of days taken by B will be 1.5X
The difference is 8, so X = 16.
So, A completes in 16 days and B in 24 days.
If both of them work on alternate days, in two days, the work done will be 1/16+1/24 = 5/48
So, in 9*2 = 18 days, they complete 45/48 of the work.
The remaining 3/48 = 1/16 of the work will be completed by A on the 19th day.