A, B and C working individually can complete a task in 30 days, 15 days and 10 days respectively. If A starts workign alone and B and C hepls A on every 2 nd and 3 rd day respectively , how long will it task to be completed?
Created: 2 years ago |
best des
A=1/30 ; B=1/15=2/30; C=1/10=3/30;
B and C help only on every 2nd and 3rd days. So that in a week alone work on 1st, 4th, 5th, 6th, and 7th day.
So that days need to finish the work is = 1 + (1+2+3) + 1 + (1+2+3) + 1 + 1 + 1 + 1 + (1+2+3) + 1 + (1+2+3) = 11 days ad 100 percent of work.
Here, (1+2+3) is that work when they work together
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