Question

A and B can do a piece of work in 18 days BNC in 24 days and a and C in 36 days Inn what time can they do the working together

Answer 1

Answer:16 days is right answer

Step-by-step explanation:

According to statement we know thatA+B=18DAYs

B+C= 24 DAYS

C+A = 36 days

take LCM we get 72 LCM

that is total work is 72 units

now a and b can do 4 unit works per day

b and c can do 3 unit work per day

and c and a can do 2 unit of work per day

now add all of them we get 4+3+2 = 9

it means 2(a+b+c) can do 9 units work per day

2 is here bcoz all of them are counted 2 timesit means a+b+c = 4.5

now

total work/efficiency= time taken

72/4.5= 16 days