Working 5 hours a day, a can complete a work in 8 days and working 6 hours a day, b can complete the same work in 10 days. working 8 hours a day, they can jointly complete the work in
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a × 8×5 =b × 6×10
a: b = 3:2
total work = 8×5×3
join 3+2 =5
so work / efficiency =8×5×3/5×8 =3 hours
a: b = 3:2
total work = 8×5×3
join 3+2 =5
so work / efficiency =8×5×3/5×8 =3 hours
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