Answer variants:
A ramp for unloading a moving truck has an angle of elevation of 45\(^{\circ}\). If the top of the ramp is 0.8 \(m\) above the ground level, then the length of the ramp is \(m\).
(Note: Use \(\sqrt{2} = 1.414\) and \(\sqrt{3} = 1.732\) if necessary.)