Advertisements
Advertisements
प्रश्न
A printer, prints a book of 300 pages at the rate of 30 pages per minute. Then, how long will it take to print the same book if the speed of the printer is 25 pages per minute?
Advertisements
उत्तर
Let the required time taken to print be x
As the speed increases time taken to print decreases
∴ They are in inverse proportion
Time taken to print 30 pages = 1 min
∴ Time taken to print 300 pages = `300/30` = 10 min
| Time taken to print (in minutes) | 10 | x |
| Number of pages printed per minutes | 30 | 25 |
x1y1 = x2y2
10 × 30 = x × 25
x = `(30 xx 10)/25` = 12 min
Time taken to print = 12 min
APPEARS IN
संबंधित प्रश्न
A contractor estimates that 3 persons could rewire Jasminder’s house in 4 days. If, he uses 4 persons instead of three, how long should they take to complete the job?
In which of the following table x and y vary inversely:
| x | 4 | 3 | 6 | 1 |
| y | 9 | 12 | 8 | 36 |
It x and y vary inversely, fill in the following blank:
| x | 12 | 16 | ... | 8 | ... |
| y | ... | 6 | 4 | ... | 0.25 |
If x and y vary inversely as other and x = 5 when y = 15, find x when y = 12 .
When two quantities x and y are in ______ proportion or vary ______ they are written as `x oo 1/y`.
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.
If 12 pumps can empty a reservoir in 20 hours, then time required by 45 such pumps to empty the same reservoir is ______ hours.
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.
The number of people working and the time to complete a given work.
If x varies inversely as y and y = 60 when x = 1.5. Find x. when y = 4.5.
