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NIELIT 2022 Feb Scientist D - Section D: 19

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If a car driver divides a distance into $3$ equal parts and travels the three parts with speeds of $48, 54$ and $72$ km/hr, respectively. The average speed for the whole journey is :

  1. $54 \; \text{km/hr}$
  2. $56.3 \; \text{km/hr}$
  3. $58.3 \; \text{km/hr}$
  4. $60 \; \text{km/hr}$

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