Find the sum of the lengths of all edges of a rectangular parallelepiped, if its measurements are equal; 3dm 5cm, 4dm 9cm, 45mm.
First of all, we bring all the values to one unit of measurement, for example, in cm: 3 dm 5 cm = 35 cm, 4 dm 9 cm = 49 cm,
45 mm = 4.5 cm.
Find the sum of the lengths of all edges of the rectangular parallelepiped, which is equal to the product of the number 4 and the sum of all three dimensions of the rectangular parallelepiped. Thus, we get:
L = 4 (35 + 49 + 4.5) = 4 * 88.5 = 354 (cm) or 35 dm 4 cm.
Answer: the sum of the lengths of all edges of a rectangular parallelepiped is 354 cm or 35 dm 4 cm.
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