If the ratio x:y = 3:5 and y:z = 4:7, find the ratio x:y:z
-
A.
15 : 28 : 84 -
B.
12 : 20 : 35 -
C.
3 : 5 : 4 -
D.
5 : 4 : 7
Correct Answer: Option 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