Question

The number of days needed to finish a quilt varies inversely as the number of people working on it. If it takes 15 days for three people to finish a quilt, how many people would be needed to finish it in 2.5 days?


0.5

18

12

20

Answer 1

y - days
x - people
y=k/x
15=k/3 => k=45
so equation is y =45/x
2,5=45/x => x=45/2,5 =18