RRB ALP practice question
A jogger runs at 14.4 km/h. How many seconds will he take to go once round a square field of side 90 m?
From a RRB ALP Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 90 seconds
Perimeter = 4 × 90 = 360 m. Speed = 14.4 km/h = 14.4 × 5/18 = 4 m/s. Time = 360/4 = 90 seconds. (Forgetting to convert km/h to m/s gives 25 — meaningless.)
हिंदी में प्रश्न
एक धावक 14.4 किमी/घंटा की चाल से दौड़ता है। 90 मी भुजा वाले वर्गाकार मैदान का एक चक्कर लगाने में उसे कितने सेकंड लगेंगे?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 90 सेकंड
परिमाप = 4 × 90 = 360 मी। चाल = 14.4 किमी/घंटा = 14.4 × 5/18 = 4 मी/से। समय = 360/4 = 90 सेकंड। (किमी/घंटा को मी/से में न बदलने पर 25 आता है — जो अर्थहीन है।)
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