Question

The length of the longest rod that fits in a box is 21 cm. If l=20 cm and
b=5 cm. Find the height of the box

Answer 1

Step-by-step explanation:

l=20cm. , d=21cm. , b=5cm

formula:-

$h = \sqrt{l {}^{2} + b {}^{2} + h {}^{2} } \\ 21 = \sqrt{20 {}^{2} + 5 {}^{2} + h {}^{2} } \\ 21 = \sqrt{400 + 25 + h {}^{2} } \\ 21 - \sqrt{425} = \sqrt{h {}^{2} } \\ 21 - 20.61 = h \\ h = 0.29cm$

The answer must be 0.29cm,

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