Question

A can do a work in 6 days and b9 days how many days will work togethsr to complete the work

Answer 1

answer: Part of work finished by A in a day= 1/6
Part of work finished by B in a day =1/9
part of work finished together A and B= 1/6 + 1/9
= 3+2/18 = 5/18
A and B together can complete work = 18/5days
= 3 days 14 hours 24 minutes
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Answer 2

Answer:

3.6 days

Step-by-step explanation:

lcm of 6 and 9 is 18

working efficiency of A is 18/6= 3 days

working efficiency of B is 18/9 = 2 days

efficiency of both= 3+2 = 5

then both together complete the work= 18÷ 5= 3.6 days.