Advertisements
Advertisements
Question
If a: b = 4: 7, find the following:
`(5"a" - 4"b")/(2"a" - 3"b")`
Advertisements
Solution
a : b = 4 : 7 ⇒ `"a"/"b" = 4/7`
`(5"a" - 4"b")/(2"a" - 3"b") = (5 xx "a"/"b" - 4)/(2 xx "a"/"b" - 3)`
= `(5 xx 4/7 - 4)/(2 xx 4/7 - 3)`
= `(20/7 - 4)/(8/7 -3)`
= `(-8)/-13 = 8/13`
APPEARS IN
RELATED QUESTIONS
The work done by (x – 2) men in (4x + 1) days and the work done by (4x + 1) men in (2x – 3) days are in the ratio 3 : 8. Find the value of x.
Find the reciprocal ratio of e following :
`1/45 : 1/54`
Find the number which bears the same ratio to `7/33` that `8/21` does to `4/9`.
Express the given ratio in its simplest form: 200 m : 5 km
Divide 81 into three parts in the ratio 2 : 3 : 4.
If the angles of a triangle are in the ratio 2 : 3 : 4, find the angles.
Find the simplified form of the following ratio.
7 : 15
15 m : 40 m = 35 m : 65 m
Which pair of ratios are equal? And why?
`2/3, 4/6`
A ratio is a relationship between two quantities of the same kind obtained by:
