alleryएक खुला शीर्ष घनाकार बॉक्स 8 × 5 × 3 सेमी है; इसका बाहरी क्षेत्र? मोटाई पर ध्यान न दें.
A158 cm²
B120 cm²
C94 cm²
D118 cm²
Answer & Solution
Correct answer: D. 118 cm²
आधार और चारों भुजाओं का कुल क्षेत्रफल 8 × 5 + 2 × 8 × 3 + 2 × 5 × 3 = 118 सेमी ² है।
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