Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
A and B can do the work in =`6 2/3` days = `20/3` days
B can do the work in = 10 days
∴ (A + B)'s 1-day work =`3/20`
B's 1-day work =`1/10`
A's 1-day work =`3/20-1/10`
`=(3-2)/20=1/20`
∴ A can do the work in = 20
APPEARS IN
संबंधित प्रश्न
A car takes 6 hours to reach a destination by travelling at a speed of 50 km per hour. How long will it take when the car travels at a speed of 75 km per hour?
Cost of 24 identical articles is Rs. 108, Find the cost of 40 similar articles.
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?
A and B working together can mow a field in 56 days and with the help of C, they could have mowed it in 42 days. How long would C take by himself?
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 a piece of work in 10 days; B in 18 days; and A, B, and C together in 4 days. In what time would C alone 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 and B can do a piece of work in 40 days; B and C in 30 days; and C and A in 24 days.
- How long will it take them to do the work together?
- In what time can each finish it working alone?
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.
X alone can do a piece of work in 6 days and Y alone in 8 days. X and Y undertook the work for ₹ 48000. With the help of Z, they completed the work in 3 days. How much is Z’s share?
