Question

if a:b=2:5,find (3a+4b):(4a+5b).​

Answer 1

First, we are given a:b=2:5

We can let a=2k and b=5k.

Now, put that into (3a+4b):(4a+5b)

3a+4b=26k

4a+5b=33k

And finally (3a+4b):(4a+5b)=26:33

Answer 2

Answer:

let 2:5 be x i.e., 2x , 5x

(3.2x + 4.5x ) : ( 4.2x + 5.5x )

6x + 20x : 8x + 25x

3x + 4x :. 4x + 5x

hope it helps