What is the value of x?

According to the problem, think of a triangle with:

leg 1 = 28

leg 2 = 21

Hypotenuse = 5x

-So, to find the missing hypotenuse, you need to use the "Pythagorean Theorem" in order to solve and get the hypotenuse:

Then, start solving:

-Since, the hypotenuse has length of 5x meters, this could mean:

So, the answer is

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted