Advertisements
Advertisements
प्रश्न
Forty students stay in a hostel. They had food stock for 30 days. If the students are doubled then for how many days the stock will last?
उत्तर
Let the required number of days be x.
| Number of days | 30 | x |
| Number of students | 40 | Doubled = 2 × 40 = 80 |
As the number of students increases the food last for less number of days
∴ They are in inverse proportion.
x1y1 = x2y2
30 × 40 = x × 80
x = `(30 xx 40)/80`
x = 15
The food stock lasts for 15 days
APPEARS IN
संबंधित प्रश्न
In which of the following table x and y vary inversely:
| x | 5 | 20 | 10 | 4 |
| y | 20 | 5 | 10 | 25 |
A group of 3 friends staying together, consume 54 kg of wheat every month. Some more friends join this group and they find that the same amount of wheat lasts for 18 days. How many new members are there in this group now?
If x and y vary inversely as other and x = 3 when y = 8, find y when x = 4 .
Three persons can build a small house in 8 days. To build the same house in 6 days, how many persons are required?
Mohanrao took 10 days to finish a book, reading 40 pages every day. How many pages must be read in a day to finish it in 8 days?
If 40 workers can do a project work in 8 days, then _________ workers can do it in 4 days
4 typists are employed to complete a work in 12 days. If two more typists are added, they will finish the same work in _________ days
A flood relief camp has food stock by which 80 people can be benefited for 60 days. After 10 days 20 more people have joined the camp. Calculate the number of days of food shortage due to the addition of 20 more people?
Both x and y are said to vary ______ with each other if for some positive number k, xy = k.
If x varies inversely as y and y = 60 when x = 1.5. Find x. when y = 4.5.
