One mechanic can execute the order in 6 hours, and another in 10 hours. In how many hours will they execute the order working in common?

299
1) 1/6 + 1/10 = 5/30 + 3/30 = 8/30 general performance 2) 1: 8/30 = 30/8 = 3.75 hours = 3 3/4 hours = 3 hours 45 minutes will execute working vmeste1) 1/6+1/10=5/30+3/30=8/30 2) 1: 8/30=3 3/4 Answer: 3 hours 45 minutes
159
Answer add