With the current 40 miles per hour Against the current 30 miles per hour bv means boat velocity with NO current cv means current velocity A) bv + cv = 40 mph B) bv - cv = 30 mph Adding both equations: 2bv = 70 boat velocity with NO CURRENT = 35 miles per hour
The segment perpendicular to the chord bisects it. The hash marks indicate that both chords are the same length, so their distance from the center is the same. x = 7