SSC GD Constable previous year question
A solid metallic sphere of radius 15 cm is melted and recast into a cone having a diameter of the base as 15 cm. What is the height of the cone?
Asked in SSC GD Constable 2024: 23 Feb 2024 Shift 1 · Quantitative Aptitude
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Correct answer: (B) 240 cm
Sphere volume = (4/3)π×15³=4,500π. Cone (r=7.5): (1/3)π×56.25×h=18.75πh. Equal: h=4,500/18.75=240 cm.
हिंदी में प्रश्न
15 cm त्रिज्या वाले एक ठोस धातु के गोले को पिघलाकर 15 cm आधार व्यास वाले एक शंकु में ढाला जाता है। शंकु की ऊंचाई कितनी है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 212 cm
Sphere volume = (4/3)π×15³=4,500π. Cone (r=7.5): (1/3)π×56.25×h=18.75πh. Equal: h=4,500/18.75=240 cm.
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