three mutually tangent spheres of radius 1 rest on a horizontal plane . a sphere of radius 2 rests on them.what is the distance from the plane to the top of the larger sphere?
a) 3 +√30 / 2 b) 3 +√69/2 c) 59/2 d)3+ 2√2
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three mutually tangent spheres of radius 1 rest on a horizontal plane . a sphere of radius 2 rests on them.what is the distance from the plane to the top of the larger sphere?
a) 3 +√30 / 2 b) 3 +√69/2 c) 59/2 d)3+ 2√2