Advertisements
Advertisements
प्रश्न
On a shelf, books with green cover and that with brown cover are in the ratio 2:3. If there are 18 books with green cover, then the number of books with brown cover is ______.
पर्याय
12
24
27
36
उत्तर
On a shelf, books with green cover and that with brown cover are in the ratio 2:3. If there are 18 books with green cover, then the number of books with brown cover is 27.
Explanation:
Given, Ratio of books with green cover to books with brown cover = 2:3 Books with green cover = 18
Let the books with green cover and brown cover are 2x and 3x respectively.
Given, 2x = 18
⇒ x = `18/2`
⇒ x = 9
Thus, the books with brown cover = 3x
= 3 × 9 = 27
APPEARS IN
संबंधित प्रश्न
In a basket, the ratio between the number of oranges and the number of apples is 7 : 13. If 8 oranges and 11 apples are eaten, the ratio between the number of oranges and the number of apples becomes 1 : 2. Find the original number of oranges and the original number of apples in the basket.
Find duplicate ratio of 3 : 4
If r2 = pq, show that p : q is the duplicate ratio of (p + r) : (q + r).
Two numbers are in the ratio 5:7. If 3 is subtracted from each of them, the ratio between them becomes 2:3. Find the numbers.
Express the given ratio in its simplest form: 200 m : 5 km
If P : Q = `1/2 : 1/3` and Q : R = `1 1/2 : 1 1/3`, find P : R.
Find the third proportional to 5.25, 7
Ratio of 75 paise to ₹ 2 = _____________
The students of a school belong to different religious backgrounds. The number of Hindu students is 288, the number of Muslim students is 252, the number of Sikh students is 144 and the number of Christian students is 72. Find the ratio of the number of Hindu students to the number of Christian students.
There are 20 girls and 15 boys in a class. What is the ratio of number of girls to the total number of students in the class?
