A rectangular parallelepiped has a length of 8 cm, a width of 5 cm, and a height of 3 cm. What is its total surface area?
एक आयताकार समांतर (Parallel) षट्फलक की लंबाई 8 cm, चौड़ाई 5 cm और ऊँचाई 3 cm है। इसका कुल पृष्ठीय क्षेत्रफल (Total surface area) क्या है?
Answer और ExplanationAnswer and explanation
Answer: (B) 158 cm²
TSA = 2(lb + bh + hl) = 2(8 × 5 + 5 × 3 + 3 × 8)
= 2(40 + 15 + 24) = 2 × 79 = 158 cm²
✓
कुल पृष्ठीय क्षेत्रफल (Total surface area) 158 cm² है।
TSA = 2(lb + bh + hl) = 2(8 × 5 + 5 × 3 + 3 × 8)
= 2(40 + 15 + 24) = 2 × 79 = 158 cm²
✓
The total surface area is 158 cm².
Source: Selection Post Phase XIV (10th) · 17 Sep 2026 · Shift 3। Solution: Prashant Sir, Vijayastra।Source: Selection Post Phase XIV (10th) · 17 Sep 2026 · Shift 3. Solution by Prashant Sir, from Vijayastra.