Answer:

8316cm

Step-by-step explanation:

Given r=11.5cm, height of cylinder=18cm, height of cone=9cm=h

1

V=πr

2

h+2×

3

1

πr

2

h

1

V=π×20.5

2

×18+

3

2

π×20.5

2

×9

V=8316cm cube