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Question
An express train travelled at an average speed of 100 km/hr, slopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point ?
6 hrs 21 min
6 hrs 24 min
6 hrs 27 min
6 hrs 30 min
ANSWER : 1
Descrption
<p>The train travels 100 km in 1 hr</p> <p>the train travels 1 km in 1/100 hr</p> <p>the train travels 75 km in ( 75×1)/100 = (75×60)/100 = 45 minutes</p> <p>To travel 600 km it takes 600/75 = 8 steps</p> <p>On its way it stop in 7 steps</p> <p>On its way it stop waste ( 3×7) mints = 21 steps</p> <p>So total time = (45×8) + 21 minta = (360 + 21) mints = 6 hr 21 mints</p>
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