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If 4 examiners can examine a certain number of answer books in 8 days by working 5 hours a day, for how many hours a day would 2 examiners have to work in order to examine twice the number of answer books in 20 days.
Less examiners, more hours per day (Indirect)
More days, less hours per day (Indirect)
More answer books, more hours per day (Direct)
Days 20:8 --------- :: 5:x
Answer books 1:2
=> x = 4*8*2*5/2*20*1 = 8 hours per day
1:4:8:5 = 160
? =4 hours
4 examiners, 8 days, 5 hrs= 40 hrs. Let no. of ans books evaluated be 10 each.
2 examiners, 20 days 40 books to be evaluated.
since 20 hrs and 20 days
its 1 hr per day
20 hours in 8 days by 2 examiners
If A men working A hours a day can do A units of a work in A days, then how many units of work can be completed by B men working B hours per day.
If 9 boy working 15/2 hours a day can finish a work in 20 days, then how many days will be taken by 12 boy working 6 hours a day to finish the work, it being given than 3 boy of latter type work as much as 2 boy of he former type in the same.
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
8 woman and 12 men complete a certain piece of work in 9 days. Each woman takes twice the time taken by a man to finish the work. In how many days will 12 men finish the same work
A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ?
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