Question

If A:B = 3:4 and B:C = 5:7, find A:B:C​

Answer 1

Step-by-step explanation:

Question:-If A:B = 3:4 and B:C = 5:7, find A:B:C?

__________

Answer:-

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Given:-

• a:b=3:4
• b:c=5:7

we want to equalize b value

Take lcm of 4 and 5 = 20

• a:b=(3:4)5=15:20
• b:c=(5:7)4=20:28
• a:b:c=15:20:28

hope this helps you ☺️

Answer 2

Answer:

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= 4k/5

A : B : C = 3k : 4k : 7x = 3k : 4k : 7(4k/5) = 15k : 20k : 28k = 15 :20:28

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