Question

An athlete runs 300 metres up a hill at a steady speed of 3.0 m / s. She then immediately runs the same distance down the hill at a steady speed of 6.0 m / s. What is her average speed for the 600 metre run? A 2.0 m / s B 3.0 m / s C 4.0 m / s D 4.5 m / s

Answer 1

Answer:

4 m/s

Explanation:

formula used=> 2v₁v₂/v₁+v₂

procedure:-

total distance=600 m

v₁=3 m/s

v₂=6 m/s

using the formula,

=2×3×6/3+6

=36/9

=4 m/s

therefore, her average speed will be 4 m/s

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