Jawapan

2016-09-17T16:44:18+08:00
Buat 2 pai r.. Pastu drb 12
2016-09-17T21:37:43+08:00
Formula = 2 x pi x r

= 2 x pi x 9.8 cm
=19.6 pi cm

jarak yg dilalui = 19.6 pi x 12
                        =  235.2 pi cm <done!!!