self Maths Puzzle

The circumference of the Earth is approximately 40,000 kilometres, and someone has just made a metal band that circles the Earth, touching the ground at all locations.

You come along at night, as a practical joke, and add just 10 metres to its length (one hundredth of one kilometer !)

It is now one four-millionth longer, and sits magically just above the ground at all locations

How far has it risen ... could a flea, a rabbit or even a man squeeze underneath it?

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self Other Question
How much does the baby weigh if the mother weighs 100 pounds more than the combined weight of the baby and the dog, and the dog weighs 60 percent less than the baby? You have six beads placed in a plane.

The object is to find two pairs of equidistant beads. (In other words, find a pair of beads that are exactly the same distance apart as another pair of beads).

The distance between two beads is meant as the distance between their centers.