रेलवे परीक्षा के लिए सबसे महत्वपूर्ण प्रश्न |

Описание: लंगर डालकर रोकी हुई एक नाव लहरों से घिरी हुई है जिसका तरंगदैर्ध्य 125 मीटर है। चलती तरंगों के चढावकी गति 25 ms¹ है। नाव के हिलने की आवृत्ति क्या है?
(a) 0.20 हर्ट्ज
(b) 625 हर्ट्ज
(c) 100 हर्ट्ज
(d) 250 हर्ट्ज

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