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Question

If x:y=1:7 and y:z=4:5, find
x:y:z

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Solution

Given
xy=17...........(1)
yz=45...........(2)
Multiply (1) and (2)
xy×yz=17×45
xz=435
Now,
x=4z35
y=4z5
x:y:z=4z35:4z5:z
Multiplying with 35z
x:y:z=4:28:35

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