EASY
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IMPORTANT
Earn 100

A group of labourers promises to do a work in 12 days, but 5 of them do not turn up. If the rest of the group do the work in 18 days, find the original number of men.

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Important Questions on Time and Work

HARD
BSF GD Constable
IMPORTANT
20 women can do a job in 20 days. After each day, a woman is replaced by a man and a man is twice as efficient as a woman. On which day does the job get completed?
EASY
BSF GD Constable
IMPORTANT
If m men working m hr per day, can do m units of work in m days, then n men working n hr per day would be able to complete how many units of work in n days?
MEDIUM
BSF GD Constable
IMPORTANT
There is sufficient food for 800 men for 62 days. After 56 days, 560 men leave the place. For how many days will the rest of the food last for the rest of the men?
EASY
BSF GD Constable
IMPORTANT
Two pipes A and B can fill tank in 20 min and 30 min respectively. If both pipes are opened together, the time taken to fill the tank is?
EASY
BSF GD Constable
IMPORTANT
A tap can fill a tank in 1 hr. A second tap can empty it in 30 min. If both the taps operate simultaneously, how much time is needed to empty the tank?
MEDIUM
BSF GD Constable
IMPORTANT
12 pumps working 6 hr a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hr a day will empty the same reservoir in 12 days?
MEDIUM
BSF GD Constable
IMPORTANT
A pump can fill a tank with water in 2 hr but because of a leak in the tank it was taking 213 hr to fill the tank. The leak can drain all the water off the tank in?
MEDIUM
BSF GD Constable
IMPORTANT
Having the same capacity, 9 taps fill up a water tank in 20 min. How many taps of the same capacity are required to fill up the same water tank in 15 min?