Question

In kick boxing, the force needed to break a
board varies inversely with the length of the
board. If it takes 5 pounds of pressure to
break a board 2 feet long, how many
pounds of pressure will it take to break a
board that is 8 feet long?

Answer 1

Answer: 20

Step-by-step explanation: for every 2 you have five, 8 is equal to 2x4 so do 4x5 and you get 20.