चाल, समय तथा दुरी -1 (Speed, Time and Distance)

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इस विडियो में नीचे दिए प्रश्नों को समझाया गया है, यह प्रश्न उसीक्रम में है, जिस क्रम में विडियो में इसे समझाया गया है । प्रश्नों को पढ़ कर विडियो से समझने का प्रयत्न करें, और कुछ समस्या होने पर आप हमें कमेंट के जरिये प्रश्न पूछ सकते हैं ।

चाल, समय तथा दुरी -1 (Speed, time and Distance)
इस विडियो में हम निम्नलिखित प्रश्नों के पहलुओं को जानकर हल करने का प्रयत्न करेंगे , आप ध्यान से समझने का प्रयत्न करें ।

1. रवि 20km/hr की चाल से स्कुल जाता है, और 30km/hr से वापिस आता है, तो बताइए कुल यात्रा में औसत चाल कितनी है ?

2. एक कार चालक किसी दुरी को 60km/hr की चाल से जाता है, और 40km/hr की चाल से वापिस लौटता है, तो पूरी यात्रा में उसकी औसत चाल बताइए ?

3. एक हवाई जहाज एक वर्गाकार मैदान की चारों भुजाओं के समानंतर क्रमशः 200km/hr, 400km/hr, 600km/hr और 800km/hr की चाल से चक्कर लगाता है, तो बताइए औसत चाल कितनी है?

4. A,B और C पिकनिक के लिए निकले A ने 50km/hr की चाल से 2 घंटे तक, B ने 48km/hr की चाल से 2 घंटे तक तथा C ने 54km/hr की चाल से 1 घंटे तक कार चलाई, तो बताइए पूरी यात्रा में उसकी औसत चाल कितनी है ?

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