Find the sum of a rectangular parallelepiped if its volume is 720cm3 and two edges are 15cm and 24cm.

First of all, we will find the third dimension of a rectangular parallelepiped, provided that its volume is 720 cm³, and two edges are 15 cm and 24 cm. Let us express from the volume formula:
V = a * b * c, therefore, to find the unknown factor, divide the product by the known ones:
c = V: a: b = 720: 15: 24 = 2 cm.
The sum of the lengths of all edges of such a figure is determined by the formula:
L = 4 * (a + b + c), we find it:
L = 4 * (15 + 24 + 2) = 4 * 41 cm = 164 cm.