A group of 5 people can do a piece of work in certain number of of days. If 4 more people join the group, they take 12 days less to do the same work. In work days can a group of 3 people do the work ?A. 30B. 45C. 15D. 60

A group of 5 people can do a piece of work in certain number of of day

1.	A group of 5 people can do a piece of work in certain number of of days. If 4 more people join the group, they take 12 days less to do the same work. In work days can a group of 3 people do the work ?A. 30B. 45C. 15D. 60
Answer» Correct Answer - B (i) Use `M_(1)D_(1)=M_(2)D_(2)` (ii) Let five people do the piece of work in x days. Find x. (ii) `5(x)=9(x-12)` (iii) Let three people do the same work in y days. (v) Use, `5xx x=3xxy` and find y

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A group of 5 people can do a piece of work in certain number of of days. If 4 more people join the group, they take 12 days less to do the same work. In work days can a group of 3 people do the work ?A. 30B. 45C. 15D. 60

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