Tolong bantuannya kak.Terima kasih.

Tolong bantuannya kak.Terima kasih.

Nomor 15

$lp = (2 times p times l) + (2 times p times t) + (2 times l times t) \ lp = (2 times 20 times 15) + (2 times 20 times 12) + (2 times 15 times 12) \ lp = 600 : cm + 480 : cm + 360 : cm \ lp = {1.440 : cm}^{2}$

[Opsi D]

Nomor 16

r = d ÷ 2

r = 20 cm ÷ 2

r = 10 cm

$lp = 2 times pi times r times (r + t) \ lp = 2 times 3,14 times 10 : cm times (10 : cm + 30 : cm) \ lp = 62,8 : cm times 40 : cm \ lp = {2.512 : cm}^{2}$

[Opsi B]

Jawaban:

Lp = 2 phi r (r+t)

= 2 × 3,14 × 10 × (10+30)

= 62,8 × 40

= 2512 cm² (B)

semoga membantu yaa tolong dikoreksi lagi