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Question

x, y and z are three sums of money such that y is the simple interest on x and z is the simple interest on y for the same time and same rate. Which of the following is correct?

A
xyz=1
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B
z2=xy
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C
x2=yz
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D
yz=zx
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Solution

The correct option is A xyz=1
yissimpleinterestofxandZissimpleinterestofYatsometimeandRate,then.y=x+r+t100......................(i)z=y×r×t100........................(ii)Dividingequation(i)by(ii)yz=x×r×t100y×r×t100y=xyy2=2x

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