Jawapan

Jawapan Paling Bijak!
2015-10-04T11:00:37+08:00
1) cari jejari daripada luas yang diberi

luas = \pi j^2
346.5 =  \frac{22}{7} X j^2
j^2 = 346.5 X \frac{7}{22}
j^2 = 110.25
j = 10.5 cm

2) cari lilitan bulatan

= 2 \pi j
= 2 X  \frac{22}{7} X 10.5
= 66 cm
1 5 1