Multiple choice general knowledge sports

If r=3y, 15y=30z and 2z=p/3 then r=?

  1. p

  2. p/2

  3. p/4

  4. 2p
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A Correct answer
Explanation

From r=3y and 15y=30z, we get y=2z, so r=3(2z)=6z. From 2z=p/3, we get p=6z. Therefore r=p. This is a chain of substitutions through y and z.

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