Answers

2016-01-17T11:59:06+05:30
RT is a chord. The largest possible chord in a circle is its diameter.
diameter = 2*radius.
that is 4 units

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2016-01-17T12:21:26+05:30
The radius of the circle
The line joining R and T must be a chord
The largest chord to a circle is it`s diameter
That is the maximum possible distance between R and T is it`s diameter = 2×2
 =4 units
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