RRB NTPC CBT-1 practice question
On a 0.84 km circular track, two cyclists start together from the same point and ride in the same direction at 18 km/h and 10 km/h. Find the time after which they will meet again for the first time.
From a RRB NTPC CBT-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 6.3 minutes
Relative speed = 18 - 10 = 8 km/h. Time to meet again = 0.84/8 hours = 0.105 hours = 0.105 × 60 = 6.3 minutes.
हिंदी में प्रश्न
0.84 किमी के एक गोलाकार ट्रैक पर, दो साइकिल चालक एक ही बिंदु से एक साथ चलना शुरू करते हैं और एक ही दिशा में 18 किमी/घंटा और 10 किमी/घंटा की चाल से चलते हैं। वे पहली बार दोबारा कितने समय बाद मिलेंगे?
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सही उत्तर: (B) 6.3 मिनट
सापेक्ष चाल = 18 - 10 = 8 किमी/घंटा। दोबारा मिलने का समय = 0.84/8 घंटे = 0.105 घंटे = 0.105 × 60 = 6.3 मिनट।
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