20.50 is the amount patti is making per hour
You multiply five by 3.75 and you get 18.75 ft. to get yards you divide by three and you get 6.25 yards
1st :The angle of depression 30° = the angle of elevation (from the truck to the height of the building.
2nd :
cos 30° = (adjacent side)/(hypotenuse)
cos 30° = x/100, but cos 30°= (√3)/2
(√3)/2 = x/100 and x = (100√3)/2
and x = (50.√3) = 86.60 m