Alright, lets get started.
We have given the ratio 9:45
or
[tex] \frac{9}{45} [/tex] could be written as [tex] \frac{1}{5} [/tex]
Means the given ratio is 1:5.
Means every given number should be in this ratio 1:5.
? : 30 means
[tex] \frac{x}{30} =\frac{1}{5} [/tex]
Cross multiplying
[tex] 5x = 30 [/tex]
Hence x = 6
For 7 : ?
[tex] \frac{7}{x} =\frac{1}{5} [/tex]
Cross multiplying
x = 35
For 8 : ?
[tex] \frac{8}{x} =\frac{1}{5} [/tex]
Cross multiplying
x = 40
Hence the answers are 6 30, 7 35, 8 40. : Answer
Hope it will help :)
