allery200 m लांबीची एक आगगाडी 100 m लांबीचा प्लॅटफॉर्म 36 km per hour वेगाने ओलांडते. तिला लागणारा वेळ:
A20 seconds
B25 seconds
C30 seconds
D36 seconds
Answer & Solution
Correct answer: C. 30 seconds
1. प्लॅटफॉर्म ओलांडण्यासाठी आगगाडीला स्वतःची लांबी अधिक प्लॅटफॉर्मची लांबी एवढे अंतर कापावे लागते.
2. ती एकूण बेरीज 200 + 100 = 300 m आहे.
3. वेगाचे रूपांतर करा: 36 x 5 / 18 = 10 metres per second.
4. लागणारा वेळ 300 / 10 = 30 seconds आहे.
5. केवळ आगगाडीची लांबी वापरल्यास 20 seconds मिळतील, जो येथे दिशाभूल करणारा पर्याय आहे.
_Source: syllabus Maths, Ch 11 'Direct and Inverse Proportions', S11.3 Inverse Proportion_
Keep practising Time, Speed and Distance
Browse all Time, Speed and Distance questions for RRB NTPC, or explore more Quantitative Reasoning topics.
Related questions
A man covers a distance in 6 hours at 40 km per hour. To cover it in 4 hours he must traveA man travels equal distances at 40 km per hour and at 60 km per hour. His average speed iA train 150 m long runs at 54 km per hour. The time it takes to pass a pole is:A car covers 300 km at 50 km per hour. At 75 km per hour the same trip would take:Zaheeda doubles her speed on the same route. The time she takes:A journey takes 120 km at a steady 60 km per hour. The time taken is:For a fixed distance, if the speed is increased then the time taken: