Advertisements
Advertisements
प्रश्न
In a hostel of 50 girls, there are food provisions for 40 days. If 30 more girls join the hostel, how long will these provisions last?
Advertisements
उत्तर
| Number of girls | 50 | 80 |
| Number of days | 40 | x |
\[\text{ Since the number of girls and the number of days with food provisions are in inverse variation, we have: } \]
\[ 50 \times 40 = 80x\]
\[ \Rightarrow x = \frac{50 \times 40}{80}\]
\[ = \frac{2000}{80}\]
\[ = 25\]
\[ \text{ Thus, the required number of days is } 25 .\]
संबंधित प्रश्न
Which of the following are in inverse proportion?
The number of workers on a job and the time to complete the job.
A factory required 42 machines to produce a given number of articles in 63 days. How many machines would be required to produce the same number of articles in 54 days?
In which of the following table x and y vary inversely:
| x | 9 | 24 | 15 | 3 |
| y | 8 | 3 | 4 | 25 |
A car can finish a certain journey in 10 hours at the speed of 48 km/hr. By how much should its speed be increased so that it may take only 8 hours to cover the same distance?
Both x and y are said to vary ______ with each other if for some positive number k, xy = k.
If 12 pumps can empty a reservoir in 20 hours, then time required by 45 such pumps to empty the same reservoir is ______ hours.
If x and y are in inverse proportion, then (x + 1) and (y + 1) are also in inverse proportion.
When two quantities are related in such a manner that if one increases and the other decreases, then they always vary inversely.
If a and b vary inversely to other, then find the values of p, q, r ; x, y, z and l, m, n.
| a | l | 9 | n | 6 |
| b | 5 | m | 25 | 10 |
Two persons could fit new windows in house in 3 days.
How many persons would be needed to fit the windows in one day?
