Advertisements
Advertisements
प्रश्न
30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10 days?
Advertisements
उत्तर
∵ 30 persons can reap a field in 17 days.
1 person can reap the same field in 30 × 17 i.e. 510 days.
In 10 days, the number of persons required = `510/10` = 51 persons.
APPEARS IN
संबंधित प्रश्न
A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the length of the shadow cast by another pole 10 m 50 cm high.
A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. How much time will A alone take to finish the work?
If 12 boys earn Rs 840 in 7 days, what will 15 boys earn in 6 days?
A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak?
On increasing a, b increases in such a manner that `a/b` remains ______ and positive, then a and b are said to vary directly with each other.
A car is travelling 48 km in one hour. The distance travelled by the car in 12 minutes is ______.
In a camp, there is enough flour for 300 persons for 42 days. How long will the flour last if 20 more persons join the camp?
From the following table, determine if x and y are in direct proportion or not.
| x | 3 | 6 | 15 | 20 | 30 |
| y | 12 | 24 | 45 | 60 | 120 |
If 25 metres of cloth costs Rs 337.50, then what will be the length of the cloth bought for Rs 810?
A swimming pool can be filled in 4 hours by 8 pumps of the same type. How many such pumps are required if the pool is to be filled in `2 2/3` hours?
