The radio broadcast of Orson Welles goes as <em>"Good heavens, something's wriggling out of the shadow like a gray snake. Now it's another one, and another one, hand another one. They look like tentacles to me."</em> This is based on the story <em>War of the Worlds</em> by H. G. Wells. The story revolves around the scientific alien invasion of earth and the havoc it created.
The tense form of the given broadcast can be taken as the present verb tense. This is evidenced by the words <em>"something's wriggling [. . . ] Now it's another one"</em> and <em>"They look like tentacles to me"</em>. The words <em>"something's wriggling", "now" </em>and "<em>look</em>" all are in the present tense.
First, you need to convert 62% into a decimal, which is 0.62. Then, you need to multiply 400 and 0.62, which will give you the answer of 248. That means 248 swimmers are 18 and older.