tolong yang ahli kerjakan yaa

a. volume = π r² t
                 = 3,14 . 10² . 30
                 = 3,14 . 100. 30
                 = 314 . 30
                 = 9420 cm³
b.volume = π r² t
                 = 3,14 . 25² . 50
                 = 3,14 . 625 . 50
                 = 98125 cm³
c.volume = π r² t
                = 22/7 . 14² .50
                = 22. 28 . 50
                = 30800 cm³
d.volume = π r² t
                 = 22/7. 7² . 40
                 = 22 . 7 . 40
                 = 6160 cm³
e.volume = π r² t
                 = 22/7 . 49² . 52
                 =  22 . 343 . 52
                 = 392392 cm³
f.volume = π r² t
               = 3,14 . 17,5² . 41
                = 3,14 . 306,25 . 41
               = 39426,625 cm³