allery20 m x 15 m அளவுள்ள ஒரு புல்வெளியைச் சுற்றி வெளிப்புறத்தில் 2 m அகலமுள்ள ஒரு பாதை உள்ளது. அப்பாதையின் பரப்பளவு என்ன?
A140 m²
B136 m²
C156 m²
D176 m²
Answer & Solution
Correct answer: C. 156 m²
வெளிப்புறச் செவ்வகம் 24 x 19 = 456 m², அதிலிருந்து புல்வெளியின் பரப்பான 300 m²-ஐக் கழித்தால், 156 m² மீதமிருக்கும்.
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