Respuesta :
ramp forms a right-angled triangle w ground so that
sin(12.5deg) = perpendicular distance from top of ramp to ground / length of ramp
perpendicular distance from top of ramp to ground = sin (12.5) * 20
= 4.33 feet
sin(12.5deg) = perpendicular distance from top of ramp to ground / length of ramp
perpendicular distance from top of ramp to ground = sin (12.5) * 20
= 4.33 feet