Advertisements
Advertisements
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?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Which of the following are in inverse proportion?
Area of cultivated land and the crop harvested
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?
In which of the following table x and y vary inversely:
| x | 9 | 24 | 15 | 3 |
| y | 8 | 3 | 4 | 25 |
Three spraying machines working together can finish painting a house in 60 minutes. How long will it take for 5 machines of the same capacity to do the same job?
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 = 30, find y when constant of variation = 900.
Neelaveni goes by bicycle to her school every day. Her average speed is 12 km/hr and she reaches school in 20 minutes. What is the increase in speed, If she reaches the school in 15 minutes?
Six men can complete a work in 12 days. Two days later, 6 more men joined them. How many days will they take to complete the remaining work?
If two quantities p and q vary inversely with each other, then ______
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.
