Advertisements
Advertisements
प्रश्न
If (4x + 3y) : (3x + 5y) = 6 : 7, find x, if y = 10
Advertisements
उत्तर
(4x + 3y) : (3x + 5y) = 6 : 7
Given, y = 10
∴ (4x + 3 × 10) : (3x + 5 × 10) = 6 : 7
(4x + 30) : (3x + 50) = 6 : 7
7 × (4x + 30) = 6 × (3x + 50)
28x + 210 = 18x + 300
28x − 18x = 300 − 210
10x = 90
⇒ x = `90/10=9`
APPEARS IN
संबंधित प्रश्न
A man's monthly inoome is Rs 5,000. He saves every month a minimum of R~ 800. Find the ratio of his:
monthly savings to monthly expenses.
A school has 630 students. The ratio of the number of boys to the number of girls is 3 : 2. This ratio changes to 7 : 5 after the admission of 90 new students. Find the number of newly admitted boys.
If `"a"/"b" = "c"/"d"`, show that: `(a^3c + ac^3)/(b^3d + bd^3) = ("a" + "c")^4/("b" + "d")^4`
If a: b with a ≠ b is the duplicate ratio of a + c: b + c, show that c2 = ab.
If `a/b = c/d = e/f`, Prove that each of these ratios is equal to `(a + c + e)/(b + d + f)`.
If (x – 9) : (3x + 6) is the duplicate ratio of 4 : 9, find the value of x.
Write the following ratio in the simplest form:
48 min : 2 hours 40 min
From the given pairs, find which ratio is larger:
(3 : 7) or (4 : 9)
The length and breadth of a window are in 1m and 70 cm respectively. The ratio of the length to the breadth is _______________
Find the ratio of the following:
55 paise to ₹ 1
