A contractor estimates that 3 persons could rewire Jasminder’s house in 4 days. If, he uses 4 persons instead of three, how long should they take to complete the job?


Let time taken to complete the job be x.

The number of persons and the number of days are in inversely proportional.

Therefore, from inverse proportionality property:-

3/4 = x/4

3×4 = 4x

x = 3×4/4

x = 3


Therefore, 4 persons take 3 days to finish the wiring at Jaswinder’s house.

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