a can do a piece of work in 14 days while B can do in 21 days they begin together but 3 days before the completion of work a leaves of find the total number of days taken to complete the work
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Answer:
51/5
Step-by-step explanation:
a=14
b=21
total work =42
both total one day work = 5
a=3*3 =9
42+9 = 51
51/5
ans = 51/5
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