The figure shows a grapefruit half. The radius to the outsideof the rind is 5 cm. The radius to the inside of the rind is 4 cm. The edible part ofthe grapefruit is divided into 12 equal sections. Find the volume of the half grapefruit and the volume of one ediblesection. Give your answers in terms of .

the volume of the inside of half grapefruit is ( 128/3) pi the volume of 1 of the 12 segments is (32/9) pi

Step-by-step explanation:

The volume of half a sphere (hemisphere) is (2/3) pi r^3  

(2/3) 4^3 pi = (2/3)(64)pi = (128/3) pi  -

The volume of one of the 12 segements is the answer divided by 12

128/36 pi  =( (32/9) pi

1/800 is the right answer