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188 = (pl+pt+lt)
= (80+10t+8t)
108 = 18t
t = 108/18 = 6
VOlume = p.l.t =10.8.6 =480
376 cm² = 2(10cm . 8 cm + 10 cm . t + 8 cm . t)
376 cm² = 2(80 cm² + 10t cm² + 8t cm²)
376 cm² = 2 (80 cm² + 18t cm²)
376 cm² = 160 cm² + 36t cm²
216 cm² = 36t cm²
6 cm = t
V = p . l . t
= 10 cm . 8 cm . 6 cm
= 480 cm³