1. rusuk kubus

LP = 6 × r²

600 = 6 × r²

r = √600/6

r = √100

r = 10 cm

2. panjang rusuk kubus

LP = 6 × r²

150 = 6 × r²

r = √150/6

r = √25

r = 5 cm

3. rusuk kubus

L = r × r

225 = r × r

r = √225

r = 15 cm

4. rusuk kubus

LP = 6r²

96 = 6 × r²

r = √96/6

r = √16

r = 4 cm

5. rusuk

L = r × r

441 = r × r

r = √441

r = 21 cm

6. lebar balok

LP = 2 × ((p × l) + (p × t) + (l × t))

358 = 2 × ((12 × l) + (12 × 5) + (l × 5))

358 = 2 × (12l + 60 + 5l)

358 = 2 × (17l + 60)

358 = 2 × 17l + 2 × 60

358 = 34l + 120

34l = 358 - 120

34l = 238

l = 238/34

l = 7 cm

7. tinggi balok

LP = 2 × ((p × l) + (p × t) + (l × t))

4.840 = 2 × ((200 × 2) + (200 × t) + (2 × t))

4.840 = 2 × (400 + 200t + 2t)

4.840 = 2 × (400 + 202t)

4.840 = 800 + 404t

404t = 4.840 - 800

404t = 4.040

t = 4.040/404

t = 10 cm