The answer is A John Roebling.
The rotational speed of the two children is the same.
In fact, it is defined as
where
is the angle covered in the time
. As it can be seen, this quantity does not depend on the distance from the centre, so the rotational speed is 4.0 revolutions per minute for both children.
The Answer Is - 0.58 Kilogram's
Hope This Help's
21.8452851 * 10^21 e. Which is 21.845.285.100.000.000.000.000 electrons. A lot.