Question

If a complete a job in 20 mint and b in 30 mint if they do the same job together how much time will they take

Answer 1

Answer:

a+b/2

=20+30/2

=50/2

=25

so it takes 25 minutes

Answer 2

Answer:

they will complete a job in 10 min because

Step-by-step explanation:

the time interval between the two 20 and 30 min the time left 10 min so they will complete a job in 10 min