Jawapan

2016-09-20T20:22:54+08:00
144/25pai=6/5*luas objek
3168/175=6/5*lo
lo=3168/175*5/6=15840/1050=15.086
luas bulatan= pai j²
15.086=22/7*j²
j²=15.*7/22
j²=4.8
j=2.19

betul x?