Advertisements
Advertisements
प्रश्न
If (x + 3) : (4x + 1) is the duplicate ratio of 3 : 5, find the value of x.
Advertisements
उत्तर
If (x + 3) : (4x + 1) is the duplicate ratio of 3 : 5
Find the value of x.
We have,
`(x + 3)/(4x + 1) = 3^2/5^2`
`\implies (x + 3)/(4x + 1) = 9/25`
`\implies` 25x + 75 = 36x + 9
`\implies` 11x = 66
`\implies` x = 6
APPEARS IN
संबंधित प्रश्न
Find the ratio of the following in the simplest fcrm:
x2 + 4x +4 and x2 - x - 6
If r2 =pq, show that p : q is the duplicate ratio of (p + r) : (q + r).
Find:
The sub-duplicate ratio of the sub-triplicate ratio of 4096x6: 729y12.
The length of two ropes are in the ratio 7 : 5. Find the length of:
(i) shorter rope, if the longer one is 22.5 m
(ii) longer rope, if the shorter is 9.8 m.
If 4, x and 9 are in continued proportion, find the value of x.
In a business, A invests Rs 50000 for 6 months, B Rs 60000 for 4 months and C, Rs 80000 for 5 months. If they together earn Rs 18800 find the share of each.
Present age of father is 42 years and that of his son is 14 years. Find the ratio of age of the father to the age of son, when son was 12 years old.

In the following figure, the comparative areas of the continents are given: What is the ratio of the areas of
- Africa to Europe
- Australia to Asia
- Antarctica to Combined area of North America and South America.
A car can travel 240 km in 15 litres of petrol. How much distance will it travel in 25 litres of petrol?
Present age of father is 42 years and that of his son is 14 years. Find the ratio of age of the father to the age of son, when son was 12 years old.
