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Question

If x:y=2:3 and y:z=2:3, then x:z=
(a) 2:3
(b) 3:4
(c) 5:7
(d) 4:9

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Solution

Correct option is D. 4:9

It is given that, x:y=2:3...(i) and y:z=2:3...(ii)

From (i), we get,

xy=23

y=3x2...(iii)

Now,

yz=23

y=2z3

Putting (iii) in (ii), we get,

3x2=2z3

xz=23×23=49


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