allery20 m × 15 m आकार के एक लॉन के बाहर चारों ओर 2 m चौड़ा एक रास्ता है। रास्ते का क्षेत्रफल क्या है?
A140 m²
B136 m²
C156 m²
D176 m²
Answer & Solution
Correct answer: C. 156 m²
बाहरी आयत का क्षेत्रफल = 24 × 19 = 456 m², इसमें से लॉन का क्षेत्रफल 300 m² घटाने पर 156 m² शेष बचता है।
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