Advertisements
Advertisements
प्रश्न
If a : b = 3 : 5, find (3a + 5b): (7a – 2b).
Advertisements
उत्तर
a : b = 3 : 5
⇒ `a/b = (3)/(5)`
⇒ 3a + 5n : 7a – 2b
Dividing each term by b
`3a/b + 5 : 3a/b - 2`
⇒ `3 xx (3)/(5) + 5 : 7 xx (3)/(5) - 2`
⇒ `(9/5 + 5) : (21/5 - 2)`
⇒ `(9 + 25)/(5) : (21 - 10)/(5)`
⇒ `(34)/(5) : (11)/(5)`
= 34 : 11.
APPEARS IN
संबंधित प्रश्न
Find duplicate ratio of `3sqrt(3) : 2sqrt(5)`
Find the reciprocal ratio of e following :
`1/45 : 1/54`
A rectangular field is 100 m by 80 m. Find the ratio of breadth to its perimeter.
₹ 300 is divided between A and B in such a way that A gets half of B. Find:
- the ratio between the shares of A and B.
- the share of A and the share of B.
Two numbers are in the ratio 9 : 2. If the smaller number is 320, find the larger number.
The ratio of the length and the width of a rectangular sheet of paper is 8 : 5. If the width of the sheet is 17.5 cm; find the length.
If a : b = 3 : 11, find (15a – 3b) : (9a + 5b). a
4 : 7 = 20 : 35
The earth rotates 360° about its axis in about 24 hours. By how much degree will it rotate in 2 hours?
Out of 1800 students in a school, 750 opted basketball, 800 opted cricket and remaining opted table tennis. If a student can opt only one game, find the ratio of number of students who opted basketball to the number of students who opted table tennis.
