Advertisements
Advertisements
प्रश्न
If x varies directly as y, then
| x | 12 | 6 |
| y | 48 | – |
Advertisements
उत्तर
If x varies directly as y, then
| x | 12 | 6 |
| y | 48 | 24 |
Explanation:
If x varies directly as y, then
`x/y = k` (constant) ...(i)
If x = 12 and y = 48, then
`x/y = 12/48 = 1/4`
⇒ `k = 1/4`
When x = 6, then from equation (i),
`6/y = k`
⇒ `6/y = 1/4` ...[Putting the value of k]
⇒ 6 × 4 = y × 1 ...[By cross-multiplication]
⇒ y = 24
APPEARS IN
संबंधित प्रश्न
Complite the following table given that x varies directly as y .
| x | 4 | 9 | ... | ... | 3 | ... |
| y | 16 | ... | 48 | 36 | ... | 4 |
Rohan can paint \[\frac{1}{3}\] of a painting in 6 days. How many days will he take to complete the painting?
8 men can do a piece of work in 9 days. In how many days will 6 men do it?
If 12 boys earn Rs 840 in 7 days, what will 15 boys earn in 6 days?
The cost of 12 quintals of soyabean is 36,000 rupees. How much will 8 quintals cost?
A dozen bananas costs ₹ 20. What is the price of 48 bananas?
A truck needs 54 litres of diesel for covering a distance of 297 km. The diesel required by the truck to cover a distance of 550 km is ______.
If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be ______ hours.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Income tax and the income.
A recipe for a particular type of muffins requires 1 cup of milk and 1.5 cups of chocolates. Riya has 7.5 cups of chocolates. If she is using the recipe as a guide, how many cups of milk will she need to prepare muffins?
