If x:y=7:5, y:z= 8:9, find x:y:z =? Select:
A) 56:40:43
B) 56:40:42
C) 56:40:40
D) 56:40:45
E) 56:40:41
x:y=7:5   y:z= 8:9   x:y:z =56:40:45   Answer : 56:40:45
<result>D</result>
If x:y=7:5, y:z= 8:9, find x:y:z =?