Math Question

 

A toilet paper company sells rolls of toilet paper where the cardboard portion in the middle has a diameter of 1.8 inches and a height of 3.75 inches. How many square inches of cardboard would there be in a package of 24 rolls of toilet paper? Round your answer to the nearest roll.     

 

      A_{ONE ROLL}  =  Circumference times Length     

                       =  (3.1416) (1.8 inch) (3.75 inch)     

                       =  21.2058 in²     

      A_{24 ROLLS}   =  (24) (21.2058 in²)     

                       =  508.9392 in²  rounds to  509 in²     

   _.