Question

A and B can do a piece of work in 12 days, B and C in 15 days, C and A in 20 days. How much timewill A alone take to finish the work?

please tell step by step ​

Answer 1

12,15,20 find lcm

60unit work

60/12=5 so a,b one day 5 unit finished

60/15=4 so b,c one day 4 unit finished

60/20=3 so c,a one day 3 unit finished

(a,b+ b,c+ c,a)=12

a+b+c=6

(A+B+C)-(b+c)=2

a=2unit finished one day

60/2=30days a finished work

Step-by-step explanation:

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