!JAWAB CEPAT! Thanks! ​

Jawaban:

1. LP: 6×r×r

:6×21×21

:2.646

2. LP:2(p×l)+(p×t)+(l×t)

:2(40×5)+(40×12)+(5×12)

:2(200+480+60)

:2×740

: 1.480

3. Lp: 2×π×r×(r+t)

:2×22/7×14×(14+20)

:44×2×34

:2.992