Ask a Teacher

Search



A CONTRACTOR ESTIMATES THAT 3 PERSONS COULD REWIRE JASMIDERS HOUSE IN 4 DAYS ,IF HE USES 4 PERSONS INSTEAD OF 3,HOW LONG SHOULD THEY TAKE TO COMPLETE THE JOB?
persons                days

  3                           4
  4                            x

Since it is inverse proportion, 3:4 = x:4
                 ie,            3 / 4 = x / 4
     x = 12 / 4 = 3days


comments powered by Disqus