kenzie3343 kenzie3343

24-03-2019
Mathematics

contestada

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?

Respuesta :

14aanant 14aanant

28-03-2019

Answer:

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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