RRB NTPC Prelims Model Paper 4 with solutions

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Directions (Q. 18–20): Study the following line graph carefully and answer the following questions by selecting the correct option: The given line graph represents the relationship between the time taken and the distance covered by a motorist for a journey of 7 hours.
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Question : 20 of 100
 
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If the motorist had maintained a constant speed of 30 km/hr from 9 a.m. till 1 p.m. and a constant speed of 45 km/hr from 1 p.m. till 4 p.m., the total distance covered would have been
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