Neglecting the effect of tide and waves, determine how far out to sea a boat will be when a light on its mast 60 meters above the water disappears from the right of a man on shore whose eye level is...

Neglecting the effect of tide and waves, determine how far out to sea a boat will be when a light on its mast 60 meters above the water disappears from the right of a man on shore whose eye level is 1.583 meter above the water