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Jadhav Singh
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Asked: 2021-02-11T08:27:53+00:00 In:

On a 60 km straight road, a bus travels the first 30 km with a uniform speed of 30 kmh⁻¹. How fast must the bus travel the next 30 km so as to have average speed of 40 kmh⁻¹ for the entire trip ?

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    1 Answer

    1. Vₐᵥg = S₁ + S₂/ t₁ + t ₂ = S+S/ S(1/V₁ + 1/V₂) = 2V₁V₂/ V₁ V₂
      or 40= 2x30xv₂/V₁+V₂ ⇒V₂ = 60kmh⁻¹

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