Question

If A:B=3:4,B:C=5:7,FIND A:B:C (hint : A : B = 3:4 , B:C = 1: 7/5 = 4:28/5 ,A:B:C = 3:4:28/5)​

Answer 1

Step-by-step explanation:

A:B=3:4

Let A be 3k and B be 4k.

B:C=5:7

Let B be 5x and C be 7x

4k=5x

x=

5

4k

A:B:C=3k:4k:7x=3k:4k:7(

5

4k

)=15k:20k:28k=15:20:28

Hence A:B:C=15:20:28

Answer 2

15:20:28

Step-by-step explanation:

A:B = 3:4

B:C = 5:7

Make Value of B in both equation equal

For doing that Multiply A:B by 5 and B:C by 4

Now,

A:B = 15:20

B:C = 20:28

Therefore, A:B:C = 15:20:28