Answer:
C. 70% (water covers ⅔ of Earth's surface)
Ben's latest journey will take him from Tokyo to San Francisco, and is set to last for five months. That's 5,500 miles worth of swimming, the first-ever attempt by someone to cross the Pacific in this way. Ben will be swimming eight hours<span> a day at the average speed of two to two and a half knots per hour</span>
Hello! Are you sure you meant 400 cm long? or mi?
