Jawabanmu

2014-05-12T20:47:37+07:00
Panjang = 2l  ⇒ 2.7 = 14 cm

jadi,
L = p x l
98 = 2l x l
98 = 2l²
49 = l²
l = √49 = 7 cm

Jadi,
K= 2 (p+l)
K = 2 (14+7)
K = 42 cm

Got it ?

gaada jawaban 28 kaka.
adanya berapa ?
Lupa, harusnya kurung duluan, hehe
2014-05-12T20:53:01+07:00
Diket : p = 2l
L = p x l
98 = 2l x l
98 = 2l kuadrat
98/2 = l kuadrat
49 = l kuadrat
l = 7 cm

maka p = 2l
p = 2 x 7
p = 14 cm

K = 2 (p+l)
K = 2 (14 + 7)
K = 2 (21)
K = 42 cm