Advertisements
Advertisements
प्रश्न
A can do a work in 15 days and B in 20 days. If they together work on it for 4 days; what fraction of the work will be left?
Advertisements
उत्तर
A's 1-day work = `1/15`
B's 1-day work = `1/20`
(A+B)'s 1-day work =`1/15+1/20`
`=(4+3)/60=7/60`
(A+B)'s 4 days work =`7/60xx4=7/15`
Remaining work =`1-7/15=(15-7)/15`
`=8/15`
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?
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 fort had provisions for 450 soldiers for 40 days. After 10 days, 90 more soldiers come to the fort. Find in how many days will the remaining provisions last at the same rate?
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 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 can do a piece of work in 20 days and B in 15 days. They worked together on it for 6 days and then A left. How long will B take to finish the remaining work?
A can-do `1/4` of work in 5 days and B can do `1/3` of the same work in 10 days. Find the number of days in which both working together will complete the work.
A and B can do a work in 8 days; B and C in 12 days, and A and C in 16 days. In what time could they do it, all 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?
