If 15 men, working 9 hours a day, can reap a field in 16 days, in how many
days will 18 men reap the field, working 8 hours a day?
Choose the correct choice from the following.
A) 20 day B) 16 day C) 14 day D) 10 day E) 15 day
Let the required number of days be x.   More men, Less days (indirect proportion)   Less hours per day, More days (indirect proportion)   Men 18 : 15   Hours per day 8: 9 } : :16 : x   (18 x 8 x x)=(15 x 9 x 16) x=(44 x 15)144 = 15   Hence, required number of days = 15.   Answer is 15 day
<result>E</result>
If 15 men, working 9 hours a day, can reap a field in 16 days, in how many
days will 18 men reap the field, working 8 hours a day?