I need help i don’t quite understand

The volume of a rectangular paralellepiped, also known as a box, is length times width times height.

The big box is  20×7×12

The hallway is a box 3×5×12

Our volume is the difference,

V = 20×7×12 - 3×5×12 = 1500 cubic feet

1500

a

step-by-step explanation:

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.