Thirty men can do a work in 24 days. In how many days can 20 men can do the work, given that the time spent per day is increased by one-third of the previous time? Choose the correct answer:
A) 27 B) 88 C) 26 D) 55 E) 12
Let the number of hours working per day initially be x. we have M1 D1 H1= M2 D2 H2   30 * 24 * x = 20 * d2 * (4x)/3 =&gt; d2 = (30 * 24 * 3)/(24 * 4) = 27 days.   27nswer:27
<result>A</result>
Thirty men can do a work in 24 days. In how many days can 20 men can do the work, given that the time spent per day is increased by one-third of the previous time?