Area and Perimeter practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
A circular field is surrounded by a path 7 m wide. The circumference of the outer boundary is 176 m. Find the area of the path. Use π = 22 7.
एक वृत्ताकार मैदान के चारों ओर 7 m चौड़ा रास्ता है।
रास्ते की बाहरी सीमा की परिधि 176 m है।
रास्ते का क्षेत्रफल ज्ञात कीजिए। π = 22
7 का प्रयोग कीजिए।
Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answerसही उत्तर
C. 1078 m²C. 1078 मीटर²
Explanationव्याख्या
Outer circumference = 176 m, so outer radius R = 28 m.
Inner radius = 28 − 7 = 21 m.
Path area = π(R² − r²) = 22
7 × (28² − 21²) = 1078 m².
बाहरी परिधि = 176 m, इसलिए बाहरी त्रिज्या = 28 m।
आंतरिक त्रिज्या = 21 m।
रास्ते का क्षेत्रफल = π(28² − 21²) = 1078 मीटर²।
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