Question

The height of the four students is W, X, Y, Z and 2X = W + Z, 2W = X + Y, 2Y = W So what is the order of their height?

Answer 1

2X = W + Z  -------(1)

2W = X + Y  -------(2)

2Y = W        -------(3)

Substituting (3) in (2)

2(2Y) = X + Y

4Y - Y = X

X = 3Y

Therefore,

Y = Y

W = 2Y

X = 3Y

Hence the order of heights is,

X > W > Y

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