If the ratio x:y = 3:5 and y:z = 4:7, find the ratio x:y:z
Question
If the ratio x:y = 3:5 and y:z = 4:7, find the ratio x:y:zOptions
A)
15 : 28 : 84
B)
12 : 20 : 35
C)
3 : 5 : 4
D)
5 : 4 : 7
The correct answer is B.
Explanation:
x : y = 3.5, y : z = 4 : 7
x = 3 x 4 = 12
y = 5 x 4 = 20
y = 4 x 5 = 20
z = 7 x 5 = 35
then x : y : z = 12 : 20 : 35
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x : y = 3.5, y : z = 4 : 7
x = 3 x 4 = 12
y = 5 x 4 = 20
y = 4 x 5 = 20
z = 7 x 5 = 35
then x : y : z = 12 : 20 : 35