How much water is stored in polar ice caps glaciers and permanent snow

Consider the following problem: a box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. find the largest volume that such a box can have.

An observer that stands still as the electron moves by him, will observe

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?