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March 27, 2015

March 27, 2015

Posted by **help** on Wednesday, October 27, 2010 at 10:57pm.

- physics -
**Henry**, Thursday, October 28, 2010 at 4:39pmJohn's mass = x kg,

Mary's mass = 3x kg,

3x * 0.5 = x * d,

Solve for d by dividing both sides by x:

d = 3 * 0.5 = 1.5 m.

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