Question 134Asked in Bihar STET 2025 Paper II Computer Science, 3 Nov 2025, Shift 2 (2:00 PM)

If F,V and E are respectively the number of faces, vertices and edges of a triangularयदि F , V और E क्रमश: किसी त्रिभुजाकार प्रिज्‍म के फलकों , शीर्षों और किनारों की संख्‍याऍं है , तो

If F,V and E are respectively the number of faces, vertices and edges of a triangular prism, then which of the following statements is true?
यदि F , V और E क्रमश: किसी त्रिभुजाकार प्रिज्‍म के फलकों , शीर्षों और किनारों की संख्‍याऍं है , तो निम्‍नलिखित में से कौन-सा कथन सत्‍य है ?
  1. A4F+2V-3E=64F+2V-3E=6
  2. B2F+3V-2E = 102F+3V-2E = 10
  3. C2F+4V-3E=82F+4V-3E=8
  4. D3F+2V-2E=113F+2V-2E=11
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Correct answer: (B) 2F+3V-2E = 102F+3V-2E = 10

Explanation

A triangular prism has F = 5, V = 6 and E = 9. Then 2F + 3V - 2E = 10 + 18 - 18 = 10, so option B holds.त्रिकोणीय प्रिज़्म में F = 5, V = 6 और E = 9 होते हैं। तब 2F + 3V - 2E = 10 + 18 - 18 = 10, इसलिए विकल्प B सही है।

From Bihar STET 2025 Paper II Computer Science PYQ, 3 Nov 2025, Shift 2 (2:00 PM)

This is question 134 of Bihar STET 2025 Paper II Computer Science PYQ, 3 Nov 2025, Shift 2 (2:00 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.