The ribs of a rectangular parallelepiped measuring 12cm, 25cm, 13cm are made of wire. How many wires did it take?
| September 7, 2021 | education
It doesn’t matter which dimension is equal to a certain length (in the context of this problem), so let’s say the length is 12 centimeters, the width is 25 centimeters, and the height is 13 centimeters. The parallelepiped has 12 “edges” in total. 4 lengths, 4 widths and 4 heights. Let’s find how much wiring was required for each measurement and then add everything.
1) Length:
12 * 4 = 48 (centimeters).
2) Width:
25 * 4 = 100 (centimeters).
3) Height:
13 * 4 = 42 (centimeters).
Total:
48 + 100 + 42 = 100 + 90 = 190 (centimeters).
Answer: in total, it took 12 wires with a total length of 190 centimeters.
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