Delhi Police Constable practice question
A train running at 78 km/h crosses a motorcyclist coming from the opposite direction at 12 km/h. If the train is 225 m long, find the time taken to cross him.
From a Delhi Police Constable Quantitative Aptitude practice set · Quantitative Aptitude
Tap an option to check your answer.
Show answer and explanation
Correct answer: (A) 9 seconds
Relative speed = 78 + 12 = 90 km/h = 25 m/s. Time = 225/25 = 9 seconds.
हिंदी में प्रश्न
78 किमी/घंटा की चाल से चल रही ट्रेन विपरीत दिशा से 12 किमी/घंटा की चाल से आ रहे एक मोटरसाइकिल चालक को पार करती है। यदि ट्रेन 225 मीटर लंबी है, तो उसे पार करने में लगा समय ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 9 सेकंड
सापेक्ष चाल = 78 + 12 = 90 किमी/घंटा = 25 मीटर/सेकंड। समय = 225/25 = 9 सेकंड।
More solved Quantitative Aptitude questions
- Convert 10 m/s into km/h.
- The volume of a right circular cylinder is 4928 cm³ and its height is 2 cm. Find the radius of its base. (Use π = 22/7)
- The speed of a boat in still water is 11 km/hr and the speed of the stream is 5 km/hr. Find the downstream speed of the boat.
- If 7, 35, 175 and k are in continued proportion, then the value of k is:
- Simplify: ∛0.000343 + ∛0.343 + ∛343
- Yusuf Stores mixes ordinary mustard oil costing Rs 76 per litre with some premium mustard oil in the ratio 7:4 (cheaper : dearer) and…