Correct Answer: 236 cm2
Explanation:
∵ l + b + h = 19 and l2 + b2 + h2 = (5√5)2 = 125 ∵ (l + b + h)2 = (19)2 ⇒ (l2 + b2+ h2) + 2(lb + bh + lh) = 361 ⇒ 2 (lb + bh + lh) = (361 - 125) = 236 ∴ Surface area = 236 cm2
