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
A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the same?
Which of the following quantities vary inversely as other?
The length x of a journey by bus and price y of the ticket.
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?
Raghu has enough money to buy 75 machines worth Rs 200 each. How many machines can he buy if he gets a discount of Rs 50 on each machine?
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?
If xy = 10, then x and y vary ______ with each other.
Two quantities are said to vary ______ with each other if an increase in one causes a decrease in the other in such a manner that the product of their corresponding values remains constant.
Length of a side of an equilateral triangle and its perimeter vary inversely with each other.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Increase in cost and number of shirts that can be purchased if the budget remains the same.
If a deposit of Rs 2,000 earns an interest of Rs 500 in 3 years, how much interest would a deposit of Rs 36,000 earn in 3 years with the same rate of simple interest?
