Question

A ballroom has a square dance floor. The area of the floor is 400 square feet.

Answer 1

It is given in the qustion that

A ballroom has a square dance floor. The area of the floor is 400 square feet.

And the formula of area of square is side square.

So we will get

$400 = side^2$

Taking square root on both sides,

$side = 20$

And on increasing the side length by one foot , we will get side length of 21 feet .

And it is not a perfect square .

And the area is

$Area= 21^2 = 441 ft^2$

And 441 is a perfect square and a rational number .

Therefore true statements are A and E .