Arithmetic Ability
Time and Work

71 / 118

Q.

Application of Inverse Proportion If 20 persons can do a piece of work in 7 days then calculate the number of persons require to complete the work in 28 days

View Answer

Correct choice: D

Explanation:

Number of persons * days = work 20 * 7 = 140 man- days Now, x * 28 = 140 men- days => x =5 Therefore in second case the required number of person is 5. Second method: Since work is constant, therefore M1 x D1= M2 x D2 20 x 7 = M2 x 28 => M2 = 5
71 / 118