Advertisements
Advertisements
Question
If (x – 9) : (3x + 6) is the duplicate ratio of 4 : 9, find the value of x.
Solution
`(x - 9)/(3x + 6) = (4/9)^2`
⇒ `(x - 6)/(3x + 6) = (16)/(81)`
⇒ 81x – 729 = 48x + 96
⇒ 81x – 48x = 96 + 729
⇒ 33x = 825
⇒ x = `(825)/(33)`
= 25.
APPEARS IN
RELATED QUESTIONS
Find the sub-triplicate ratio of 216 : 343
Find the compounded ratio of the following:
(m-n):(m+n), (m+n)2 : (m2+n2) and (m4 - n4): (m2-n2) 2
State true or false :
A ratio of 250 gm and 3 kg is 1 : 12.
If m : n = 4 : 9 and n : s : 3 : 7, find m : s
If `(2"y"+5"x")/(3"y"-5"x")=2 1/2`, find y, if x = 33
Express the following ratio in the simplest form:
480 : 384
Divide Rs 1575 between Kamal and Madhu in the ratio 7 : 2.
Find the simplified form of the following ratio.
15 : 20
Find the simplified form of the following ratio.
7 : 15
Present age of father is 42 years and that of his son is 14 years. Find the ratio of age of father to the age of son when father was 30 years old.
