英文功課的問題!!!!

要猜!!
Brenda wrote something on a piece of paper, but she didi not show it to jack. The wind carried the paper off the table onto the floor.
Brenda put her foot on the paper, and said, "You musn't see the things on the paper."
Jack said, "I know it."
Brenda said, "All right, what's on the paper?"
Jack told her and he was right.

question : What didi Jack say?

If a soldier marches at a rate of 3 kilometres an hour, how many feet will he move in a minute?