Advertisements
Advertisements
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?
Advertisements
उत्तर
Let the number of days required by 4 persons to complete the job be x.
The following table is obtained.
| Number of days | 4 | x |
| Number of persons | 3 | 4 |
If the number of persons is more, then it will take less time to complete the job.
Hence, the number of days and the number of persons required to complete the job are inversely proportional to each other.
Therefore,
4 × 3 = x × 4
`x = (4 xx3)/4`
x = 3
Therefore, 4 persons will take 3 days to complete the job.
संबंधित प्रश्न
Which of the following quantities vary inversely as other?
The length x of a journey by bus and price y of the ticket.
Which of the following quantities vary inversely as other?
Journey (x km) undertaken by a car and the petrol (y litres) consumed by it.
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?
55 cows can graze a field in 16 days. How many cows will graze the same field in 10 days?
Which quantities in the previous question vary inversely with each other?
When the speed is kept fixed, time and distance vary inversely with each other.
If x and y are in inverse proportion, then (x + 1) and (y + 1) are also in inverse proportion.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
The time taken by a train to cover a fixed distance and the speed of the train.
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?
