Advertisements
Advertisements
Question
Shaheed can prepare one wooden chair in 3 days and Shaif can prepare the same chair in 4 days. If they work together, in how many days will they prepare:
(i) one chair?
(ii)14 chairs of the same kind?
Advertisements
Solution
Shaheed's 1 day's work = `1/3`
and Shaif's 1 day's work = `1/4`
Both one day's work `= 1/3 + 1/4 = (4 + 3)/12 = 7/12`
∴ Both can prepare the chair in =`12/7` days
`= 1 5/7` days
One chair is prepared in = `1 5/7` days
∴ 14 chairs will be prepared in = `12/7 xx 14 = 24` days.
APPEARS IN
RELATED QUESTIONS
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, B and C can do a piece of work in 12, 15 and 20 days respectively. How long will they take to do it working together?
A racing car covered 600 km in 3 hours 20 minutes. Find its speed in metre per second. How much distance will the car cover in 50 sec?
A boy drives his scooter with a uniform speed of 45 km/h. Find the time taken by him to cover 108 km.
A boy drives his scooter with a uniform speed of 45 km/h. Find the time taken to cover 900 m.
I travel a distance of 10 km and come back in `2 1/2` hours. What is my speed?
| 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 |
Anbarasan travelled 350 Km at the speed of 70 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?
A runner covers 900 m in 3 min. Speed in m s⁻¹ is:
