If the internal diagonal of a cuboid is 13 centimeters, and two of its sides are 3 centimeters and 4 centimeters respectively, what will be the length of the third side?
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Correct answer: B
Explanation
internal diagonal= 13 cm
Two sides = 3 cm, 4 cm
internal diagonal of a cuboid = √(l² + b² + h²)
13 = √(3² + 4² + x²)
13² = 9 + 16 + x²
169 = 25 + x²
x² = 144
x = 12 cm