Question

A can do a job in 4 1/2days, and B in 9 days.
2.
(1) How long will they take to complete the job together?​

Answer 1

Answer:

For doing this

we need to know an equation

That is a×b/a+b

whenever we have a question in this type use this equation

a = 4.5

b = 9

then 4.5×9/4.5+9

that is 40.5/13.5

= 3

3days will take for A and B to complete the job.

3days is the answer