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प्रश्न
Two persons could fit new windows in house in 3 days.
One of the persons fell ill before the work started. How long would the job take now?
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उत्तर
Let the number of days required by 1 man to fit all the windows be x. The following table is obtained.
| Number of persons | 2 | 1 |
| Number of days | 3 | x |
Lesser the number of persons, more will be the number of days required to fit all the windows. Hence, this is a case of inverse proportion.
Therefore,
2 × 3 = 1 × x
x = 6
Hence, the number of days taken by 1 man to fit all the windows is 6.
संबंधित प्रश्न
Which of the following are in inverse proportion?
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| x | 5 | 20 | 10 | 4 |
| y | 20 | 5 | 10 | 25 |
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It takes 60 days for 10 machines to dig a hole. Assuming that all machines work at the same speed, how long will it take 30 machines to dig the same hole?
x varies inversely as twice of y. Given that when y = 6, the value of x is 4. Find the value of x when y = 8
If one angle of a triangle is kept fixed then the measure of the remaining two angles vary inversely with each other.
If x varies inversely as y and y = 60 when x = 1.5. Find x. when y = 4.5.
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 |
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?
