Find the length of the longest diagonal (in cm) of a cuboidal box of dimensions 1.2 cm × 1.3 cm × 1.5 cm (correct to two decimal places).
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 2.32 cm.
Longest diagonal (d) = √(l2 + w2 + h2)
= √[(1.2)2 + (1.3)2 + (1.5)2]
= √(1.44 + 1.69 + 2.25)
= √(5.38)
= 2.319...
≈ 2.32 cm
Therefore, the length of the longest diagonal is 2.32 cm.