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Without stopped, a passenger train runs at an average of 120 km/h, whereas with stoppages, it runs at an average speed of 80 km/h. What is the total time taken by the train for stoppages on a route of length 450 km?1. 100 minutes2. 60 minutes3. 120 minutes4. 112.5 minutes |
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Answer» Correct Answer - Option 4 : 112.5 minutes Given: Without stopped, a passenger train runs at an average of 120 km/h, whereas with stoppages, it runs at an average speed of 80 km/h. Concept used: Time and distance Calculation: Time = \(\frac{{{\rm{Without\ stoppages\ - \ with\ stoppages}}}}{{{\rm{without\ stopages}}}}\) ⇒ \(\frac{{120 - 80}}{{120}}\) ⇒ \(\frac{1}{3} \times 60 = 20\min \) It stops for 20 min per hour. For stoppages ⇒ \(\frac{{450}}{{80}} \times 20 = 112.5\min \) |
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