A cuboid has a diagonal of length 9cm and a square base o...
A cuboid has a diagonal of length 9cm and a square base of side 4cm. What is its height?
9cm
√65cm
4√2cm
7cm
6.5cm
Correct answer is B
Given a cuboid, the diagonal cuts a face of the cuboid into 2 right-angled triangles.
Hence, using the Pythagoras theorem, we have
92=42+x2
81=16+x2
x2=81−16=65
∴
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