8) X and Y can do a piece of work in 12 hours together, how long wild they take to complete and as howes respectively tohoto me they wouk work ? 15
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Answer:
= 6 hours & 40min
Step-by-step explanation:
Fraction of work done by both of them together in One hour = 1/15 + 1/12
= 9/60 = 3/20
Hence, the time taken to finish the same piece of work together = 20/3 hours = 6hours + 2/3hours = 6hours & 2/3 × 60 min
= 6 hours & 40min
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