AP Police SI practice question
A train running at 72 km/h crosses a platform 180 m long in 15 seconds. Find the length of the train.
From a AP Police SI Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 120 m
Speed = 72 × 5/18 = 20 m/s.
Distance covered in 15 s = 20 × 15 = 300 m.
This equals train length + platform length.
Train length = 300 − 180 = 120 m.
हिंदी में प्रश्न
72 किमी/घंटा की गति से चल रही एक ट्रेन 180 मीटर लंबे एक प्लेटफ़ॉर्म को 15 सेकंड में पार करती है। ट्रेन की लंबाई ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 120 मीटर
गति = 72 × 5/18 = 20 मीटर/सेकंड।
15 सेकंड में तय दूरी = 20 × 15 = 300 मीटर।
यह ट्रेन की लंबाई + प्लेटफ़ॉर्म की लंबाई के बराबर है।
ट्रेन की लंबाई = 300 − 180 = 120 मीटर।
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