The question isn't complete and you might want to ask this in the math section.
But just to help you out, 3x means 3 times whatever "x" is.
Answer:
The twins then named Robert Wadlow as the tallest man "of whom there is irrefutable evidence". When last measured on 27 June 1940, the mild-mannered American stretched a staggering 2.72 m (8 ft 11.1 in) tall. Perhaps surprisingly, Robert entered the world no differently to most babies.
Answer:
So the people had better transportation and better timing.
Explanation:
