Trinitygrace1
Trinitygrace1 Trinitygrace1
  • 03-09-2020
  • Physics
contestada

a cross country runner runs 10 km in 40 minutes. what is his average speed

Respuesta :

BrainlyWarrior
BrainlyWarrior BrainlyWarrior
  • 03-09-2020

Answer :

◈ Average speed is measured as the ratio of total distance travelled to the total time taken.

Given : d = 10km and t = 40min

To Find : Vav

_________________________________

፨ Conversion :-

60 min = 1 h

40 min = 40/60 = 2/3 h

[tex]:\implies\sf\:V_{av}=\dfrac{d}{t}[/tex]

[tex]:\implies\sf\:V_{av}=\dfrac{10\times 3}{2}[/tex]

[tex]:\implies\sf\:V_{av}=\dfrac{30}{2}[/tex]

[tex]:\implies\:\boxed{\bf{\orange{V_{av}\:15\:kmph}}}[/tex]

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