Question
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Answer (Detailed Solution Below)
Option 1 : $360/7$ km/h / $360/7$ km/h
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Detailed Solution
सही उत्तर $360/7$ km/h / $360/7$ km/h है।
Key Points
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prepsnap.in • Part -AQuestion:
A forensic van covers 180 km: the first 90 km at 45 km/h and the next 90 km at 60 km/h. Its average speed is / एक फोरेंसिक वैन 180 km चलती है: प्रथम 90 km, 45 km/h और अगले 90 km, 60 km/h की गति से। औसत गति है
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$360/7$ km/h / $360/7$ km/h
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52.5 km/h / 52.5 km/h
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52 km/h / 52 km/h
4.
54 km/h / 54 km/h
Correct Answer: $360/7$ km/h / $360/7$ km/h
Time $= 90/45 + 90/60 = 3.5$ h; average speed $= 180/3.5 = 360/7 \approx 51.43$ km/h. The arithmetic mean of the speeds (52.5) is the trap. / समय $= 90/45 + 90/60 = 3.5$ घंटे; औसत गति $= 180/3.5 = 360/7 \approx 51.43$ km/h। गतियों का समांतर माध्य (52.5) भ्रम है।
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