A can complete a task in 16 days and B is 4 times faster than A. Find the part of work done by both A and B together in 1 day.
Number of days to complete the task by A = 16 days
Number of days to complete the task by B = 16/4 = 4 days
1 days work by A = 1/16
1 days work by B = 1/4
Work done by A and B together in one day= 1/16 + 1/4