If a car went the first third of the distance at 80 kmh, the second third at 15 kmh, and the last ...

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If a car went the first third of the distance at kmh, the second third at kmh, and the last third at kmh, what was the average speed of the car for the entire trip?

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Calculated Answer

30

Step by Step Solution

In order to solve problem, you must evaluate 3 / (1 / n₀ + 1 / n₁ + 1 / n₂).

• 3 / (1 / n₀ + 1 / n₁ + 1 / n₂)

• Evaluate 1 / n₀ = 0.0125

  3 / (0.0125 + 1 / n₁ + 1 / n₂)

• Evaluate 1 / n₁ = 0.066666666666667

  3 / (0.0125 + 0.066666666666667 + 1 / n₂)

• Evaluate 0.0125 + 0.066666666666667 = 0.079166666666667

  3 / (0.079166666666667 + 1 / n₂)

• Evaluate 1 / n₂ = 0.020833333333333

  3 / (0.079166666666667 + 0.020833333333333)

• Evaluate 0.079166666666667 + 0.020833333333333 = 0.1

  3 / 0.1

• Evaluate 3 / 0.1 = 30

  30
• The answer to the problem and the result of 3 / (1 / n₀ + 1 / n₁ + 1 / n₂) is 30