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 the number which bears the same ratio to `7/33` that `8/21` does to `4/9`.
Find the ratio compounded of the reciprocal ratio of 15 : 28, the sub-duplicate ratio of 36 : 49 and the triplicate ratio of 5 : 4.
Find the sub-duplicate ratio of 9x2a4 : 25y6b2
Find the value of x, if: (2x + 3) : (5x – 38) is the duplicate ratio of `sqrt(5) : sqrt(6)`.
Find the reciprocal ratio of e following :
`17/45 : 51/27`
If x = `"pab"/("a + b")`, then prove that `("x + pa")/("x - pa") + ("x + pb")/("x - pb") = (2("a"^2 - "b"^2))/"ab"`
Find the third proportional of 2 m 40 cm and 40 cm
If the cost of 5 bars of soap is Rs 82.50, then the cost of one dozen such bars is
Choose the correct answer from the given options :
The ratio of 45 minutes to `5(3)/(4)` hours is
One of the terms in a ratio cannot be 1
