Advertisements
Advertisements
प्रश्न
Five workers take 12 days to weed a field. How many days would 6 workers take? How many would 15 take?
Advertisements
उत्तर
Let us suppose 6 workers will take x days to weed a field.
As the number of workers increases, the number of days decreases.
So, the number of workers and number of days are in inverse proportion.
∴ 5 × 12 = 6 × x
⇒ x = `60/6`
⇒ x = 10 days
Let us suppose 15 workers will take y days to weed a field.
∴ 5 × 12 = 15 × y
⇒ y = `60/15`
⇒ y = 4 days
Hence, 6 workers will take 10 days, while 15 workers will take 4 days to weed a field.
संबंधित प्रश्न
In which of the following table x and y vary inversely:
| x | 9 | 24 | 15 | 3 |
| y | 8 | 3 | 4 | 25 |
It x and y vary inversely, fill in the following blank:
| x | 12 | 16 | ... | 8 | ... |
| y | ... | 6 | 4 | ... | 0.25 |
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?
10 farmers can plough a field in 21 days. Find the number of days reduced if 14 farmers ploughed the same field?
If on increasing a, b decreases in such a manner that ______ remains ______ and positive, then a and b are said to vary inversely with each other.
If p and q are in inverse variation then (p + 2) and (q – 2) are also in inverse proportion.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Compound interest on a given sum and the sum invested.
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?
Two persons could fit new windows in house in 3 days.
How many persons would be needed to fit the windows in one day?
