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13 January, 06:40

Lara is a skier. She completed a ski race in 1 minute 54 seconds. The race was 475 m in length. Lara assumes that her average speed is the same for each race.

a) Using the assumption, work out how long Lara should take to complete a 700m race. Give your answer in minutes and seconds.

b) Lara's average speed actually increases the further she goes. How does this affect your answer to part a?

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  1. 13 January, 06:54
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    a) 2 minutes 48 seconds

    b) The time would decrease as it takes less time for Lara to finish the race.

    Step-by-step explanation:

    Speed = Distance / Time

    Speed = 475 / 114

    Speed = 4.16m/s

    Distance = 700m

    Time = Distance/Speed

    Time = 700/4.16

    = 168 seconds

    = 2 minutes and 48 seconds
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