Question

A takes 8 days to complete a job B TAKES 10 DAYS TO DO THE SAME JOB ,after A worked for two days B joins him.how many days will they take to complete the job

Answer 1

Work done in 1 day = 1/8
so ....................2 day =1/8 ×2 =1/4


Now both worked together

1/8 + 1/10= 9/40 in 1 day

to do complete they takes 40/9 days


A & B work 9/40 work in 1 day

so days they have to work for doing 1/4 work are 40/9 ×1/4 = 10/9

They will take
$1 \frac{1}{9} \: days$

Answer 2

Answer:

A takes 8 days to finish a piece of work. B takes 10 days to finish the same work. How long will it take to finish the work when both of them are working together? *

18 days

2 days

9 days

40/9 days