Question

A is 30% more efficient than b how much time will they working together take to complete a job which a alone could have done in 23 days

Answer 1

Answer:

Let B efficiency = 10

than A efficiency = 13

efficiency = 13:10 (A:B)

A did whole work alone in 23 days .

it means total work = 23*13

now, both did total work in = 23*13/23 = 13 days (Ans.)

[ mark as brainlist if you understand my solution]