Question

a can do a pice of work in 15days b can do it in 20 if they work together how many days will it take to finish the work​

Answer 1

Man A completes the work in 15 days so he can do 1/15th of the work in 1 day.

Man B completes the work in 20 days so he can do 1/20th of the work in 1 day.

If they work together to complete the job then both A and B will complete the piece of work in:

= 1/15 + 1/20

= 15+20/20*15

= 20 + 15/300

= 35/300

= 7/60

Thus, both A and B will do the same work in 60/7 days or 8 full day and 4/7 days part of a day

Answer 2

Answer:

Man A completes the work in 15 days so he can do 1/15th of the work in 1 day.

Man B completes the work in 20 days so he can do 1/20th of the work in one day

If they work together to complete the job then both A and B will complete the piece of work in:

=1/15+1/20

=15+20/20×15

=20+15/300

=35/300

=7/60

Hope it helps!

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