allery200 m ଲମ୍ବ ବିଶିଷ୍ଟ ଏକ ଟ୍ରେନ୍ 36 km per hour ବେଗରେ 100 m ପ୍ଲାଟଫର୍ମକୁ ଅତିକ୍ରମ କରେ। ଏହା କେତେ ସମୟ ନିଏ:
A20 seconds
B25 seconds
C30 seconds
D36 seconds
Answer & Solution
Correct answer: C. 30 seconds
1. ଏକ ପ୍ଲାଟଫର୍ମକୁ ଅତିକ୍ରମ କରିବା ପାଇଁ ଟ୍ରେନକୁ ନିଜର ଦୈର୍ଘ୍ୟ ସହିତ ପ୍ଲାଟଫର୍ମର ଦୈର୍ଘ୍ୟ ଅତିକ୍ରମ କରିବାକୁ ପଡ଼ିବ।
2. ସେହି ମୋଟ ଦୂରତା ହେଉଛି 200 + 100 = 300 m।
3. ବେଗକୁ ରୂପାନ୍ତରିତ କରନ୍ତୁ: 36 x 5 / 18 = 10 metres per second।
4. ସମୟ ହେଉଛି 300 / 10 = 30 seconds।
5. କେବଳ ଟ୍ରେନର ଦୈର୍ଘ୍ୟ ବ୍ୟବହାର କଲେ 20 seconds ମିଳିବ, ଯାହା ଏଠାରେ ଏକ ଭ୍ରମାତ୍ମକ ବିକଳ୍ପ (trap distractor)।
_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: