Question

If 5 workers can pave 10 driveways in 30 days, how many days would it take 20 workers to pave 38 driveways?

Answer 1

5 workers pave 10 driveways in = 30 days
5 workers pave 1 driveway in = 30×10 days
1 worker pave 1 driveway in = 30×10×5
20 workers pave 1 driveway in = (30×10×5)/20
20 worker pave 38 driveways in = (30×10×5)/(20×38)
30×10×5/20×38
15×5/38
75/38
1.97
means 2 days



I hope this is correct