Optional extension The cross-section of an underpass is modelled by $h=4.5-0.25x^2$, where $h$ m

Question

Optional extension The cross-section of an underpass is modelled by $h=4.5-0.25x^2$, where $h$ metres is the height and $x$ metres is horizontal displacement from the centre.

Accepted Answer

(a) $6\sqrt2\approx8.49$ m (b) $3.825$ m.

Dimensions and safety height of an underpass

Dimensions and safety height of an underpass

Solution:

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