A certain number of persons can complete a work in 34 days, working 9hrs a day. If the number of persons is decresed by 40%, then how many hours a day should the remaining persons work to complete the work in 51 days ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 ie 10.
x × 34 × 9 = 0.6x × h × 51
h = 
h = 10