Question

person a can complete a job in 48 minutes while B can complete the same job in 60 minutes how long will they take to complete the job together

Answer 1

A can complete a work in 48minutes
In 1 minute A can do 1/48 of work

Similarly in 1 minute B can do 1/60 of work

Together in 1 minute they would do
$\frac{1}{48} + \frac{1}{60} \\ = \frac{5}{240} + \frac{4}{240} \\ = \frac{9}{240}$
simplifying 9/240 we get

9/240
= 3/80



In 1 minute A and B together can do 3/80 of work


So whole work they can do in 1 ÷ 3/80
= 1 × 80/3

= 80/3 minutes

= 26.67 minutes


So they can finish the work in 80/3 or 26.67 minutes