Jawabanmu

2014-09-09T19:54:00+07:00
/pi x r² x t
= (3,14 x 7.5) x (7.5 x 7 cm)
=  23.55 x  52.5
=  1236.375
2014-09-09T19:54:43+07:00
22/7 x 7,5 x 7,5 x 7
= 22x 7,5 x 7,5
= 165 x 7,5
= 1.237,5