Advertisements
Advertisements
प्रश्न
A can finish a piece of work in 15 days and B can do it in 10 days. They worked together for 2 days and then B goes away. In how many days will A finish the remaining work?
Advertisements
उत्तर
A can finish a piece of work in = 15 days
B can finish a piece of work in = 10 days
∴ A's 1 day work =`1/15`
B's 1-day work =`1/10`
(A+B)'s 1-day work =`1/15+1/10`
`=(2+3)/30=5/30=1/6`
(A+B)'s 2 days work =`1/6xx2=1/3`
Remaining work which will be done by A alone
`=1-1/3=(3-1)/3=2/3`
∴ A can finish 1 work in = 15 days
A can finish `2/3` work in =`15xx2/3` days
`=30/3`days = 10 days
APPEARS IN
संबंधित प्रश्न
A train is moving with a uniform speed of 120 km per hour.
(i) How far will it travel in 36 minutes?
(ii) In how much time will it cover 210 km?
72 men do a piece of work in 25 days. In how many days will 30 men do the same work?
If 15 men can complete a piece of work in 30 days, in how many days will 18 men complete it?
In order to complete a work in 28 days, 60 men are required. How many men will be required if the same work is to be completed in 40 days?
If 12 men or 18 women can complete a piece of work in 7 days, in how many days can 4 men and 8 women complete the same work?
A contractor undertakes to dig a canal, 6 kilometers long, in 35 days and employed 90 men. He finds that after 20 days only 2 km of the canal has been completed. How many more men must be employed to finish the work on time?
A and B together can do a piece of work in `6 2/3` days, but B alone can do it in 10 days. How long will A take to do it alone?
A can do a piece of work in 24 days, A and B can do it in 16 days and A, B, and C in `10 2/3` days. In how many days can A and C do it working together?
A can do a piece of work in 10 days, B in 12 days, and C in 15 days. All begin together but A leaves the work after 2 days and B leaves 3 days before the work is finished. How long did the work last?
Two pipes P and Q would fill an empty cistern in 24 minutes and 32 minutes respectively. Both the pipes being opened together, find when the first pipe must be turned off so that the empty cistern maybe just filled in 16 minutes.
