Question

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

Answer 1

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

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፨ Conversion :-

60 min = 1 h

40 min = 40/60 = 2/3 h

$:\implies\sf\:V_{av}=\dfrac{d}{t}$

$:\implies\sf\:V_{av}=\dfrac{10\times 3}{2}$

$:\implies\sf\:V_{av}=\dfrac{30}{2}$

$:\implies\:\boxed{\bf{\orange{V_{av}\:15\:kmph}}}$