A man complete a job in four days working ten hours a day. In how many days can he complete it if he works eight hours a day?

5 10 2.5 4

5

The formula that we used here is :- M1 × D1 × H1 = M2 × D2 × H2 Where, M = Number of men D = Number of days H = Number of Hours taken ATQ, M1 × D1 × H1 = M2 × D2 × H2 1 × 4 × 10 = 1 × D2 × 8 40 = 8 × D2  D2 = 5 So, he complete the same work is 5 days.