Advertisements
Advertisements
प्रश्न
90 men can complete a work in 24 days working 8 hours a day. How many men are required to complete the same work in 18 days working `7 1/2` hours a day?
Advertisements
उत्तर
In 24 days, working 8 hours a day, work can be completed by = 90 men
In 1 day, working 8 hours a day, work can be completed by = 90 × 24 men
In 18 days, working 8 hours a day, work can be completed by =`(90xx24)/18` men
In 18 days, working 1 hour a day, work can be completed by = `(90xx24)/18xx8` men
In 18 days, working `7 1/2` i.e. `15/2` hours a day, work can be completed by =`(90xx24xx8)/18xx2/15` men
`=(90xx24xx8xx2)/(18xx15)=(1xx24xx8xx2)/3` = 128 men
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?
12 pipes, all of the same size, fill a tank in 42 minutes. How long will it take to fill the same tank, if 21 pipes of the same size are used?
If 56 workers can build a wall in 180 hours, how many workers will be required to do the same work in 70 hours?
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, B, and C can do a piece of work in 6 days, 12 days, and 24 days respectively. In what time will they altogether do it?
A and B complete a piece of work in 24 days. B and C do the same work in 36 days; and A, B, and C together finish it in 18 days. In how many days will:
(i) A alone,
(ii) C alone,
(iii) A and C together, complete the work?
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?
P and Q can do a piece of work in 12 days and 15 days respectively. P started the work alone and then after 3 days, Q joined him till the work was completed. How long did the work last?
P alone can do `1/2` of a work in 6 days and Q alone can do `2/3` of the same work in 4 days. in how many days will they finish `3/4` of the work, working together?
