Advertisements
Advertisements
प्रश्न
A can do a piece of work in 4 days and B can do the same work in 5 days. Find, how much work can be done by them working together in:
- one day
- 2 days
What part of work will be left, after they have worked together for 2 days?
उत्तर
A can do a piece of work in 4 days
and B can do the same work in 5 days
∴ A's one day's work = `1/4`
and B;s one day's work = `1/5`
(i) A and B's both one day's work = `1/4 + 1/5`
`= (5 + 4)/20 = 9/20`
(ii) A and B's 2 day's work `= 9/20 xx 2 = 9/10`
∴ work left after 2 day's = `1 - 9/10`
`= (10 - 9)/10 = 1/10`
APPEARS IN
संबंधित प्रश्न
A and B working together can do a piece of work in 10 days B alone can do the same work in 15 days. How long will A alone take to do the same work?
A and B take 6 hours and 9 hours respectively to complete a work. A works for 1 hour and then B works for two hours.
(i) How much work is done in these 3 hours?
(ii) How much work is still left?
Mohit can complete a work in 50 days, whereas Anuj can complete the same work in 40 days. Find:
(i) work done by Mohit in 20 days.
(ii) work left after Mohit has worked on it for 20 days.
(iii) time taken by Anuj to complete the remaining work.
A, B and C together finish a work in 4 days. If A alone can finish the same work in 8 days and B in 12 days, find how long will C take to finish the work.
A boy drives his scooter with a uniform speed of 45 km/h. Find the distance covered by him in 1 hour 20 min.
A boy drives his scooter with a uniform speed of 45 km/h. Find the time taken by him to cover 108 km.
| S.No | Speed | Distance | Time (Hours) |
| i | 35 Km/hour | 280 Km | |
| ii | 40 Km/hour | 360 Km | |
| iii | 45 Km/hour | 315 Km | |
| iv | 50 Km/hour | 300 Km | |
| v | 55 Km/hour | 275 Km |
Nazar travelled 360 Km at the speed of 90 Km/hour. Find the time taken for his travel
Fathima reached 480 Km at the speed of 120 Km/hour. How much time did she travelled?
These log boats do not go very far. If the wind is helpful, then travel about 4 km in one hour.
Guess how far you can go in one hour if you walk fast.
