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[Wonder Boy]

Q. Carpenter A makes a chair in 6 hours, B makes it in 7 hours and C makes it in 8 hours. If every carpenter works for 7 hours in a day, then how many chairs can be made in 21 days ?

a.) 61

b.) 67

c.) 63

d.) 79

Solve and give answer option with your solution below 🙂

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