LIC AAO Prelims practice question
The diameter of a solid sphere is 70 cm. Find its surface area. (Use π = 22/7)
From a LIC AAO Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 15400 cm²
Diameter = 70 cm, so radius r = 70/2 = 35 cm. Surface area of sphere = 4πr² = 4 × (22/7) × 35² = 15400 cm².
हिंदी में प्रश्न
एक ठोस गोले का व्यास 70 सेमी है। इसका पृष्ठीय क्षेत्रफल ज्ञात कीजिए। (π = 22/7 का प्रयोग करें)
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 15400 cm²
व्यास = 70 सेमी, अतः त्रिज्या r = 70/2 = 35 सेमी। गोले का पृष्ठीय क्षेत्रफल = 4πr² = 4 × (22/7) × 35² = 15400 वर्ग सेमी।
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