Question

A, B and C can polish the floor together in 4 days. B alone can polish it in 10 days and C alone can polish
it in 12 days. In how many days will A do this work alone?

answers is 15 days but how to solve in correct solution?

answer correctly Quickly ??​

Answer 1

Answer:

This is the answer to this question

Answer 2

Step-by-step explanation:

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