A, B and C can do a piece of job in 6, 8 and 12 hours, respectively. In how many days would all of them complete the same job working together?
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Answer:
we will find lcm
6 = 2×3
8= 2 ×2 ×2
12 =2×2
lcm =2× 2×3×2
=24
all of them would complete the same job in 24 days
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