Julian is using a biking app that compares his position to a simulated biker traveling Julian's target speed. When Julian is behind the simulated biker, he has a negative position.
Julian sets the simulated biker to a speed of 20\,\dfrac{\text{km}}{\text{h}}20
h
km
20, start fraction, start text, k, m, end text, divided by, start text, h, end text, end fraction. After he rides his bike for 151515 minutes, Julian's app reports a position of -2\dfrac{1}{4}\,\text{km}−2
4
1
kmminus, 2, start fraction, 1, divided by, 4, end fraction, start text, k, m, end text.
What has Julian's average speed been so far?
Answers
Answered by
10
Given : Julian is using a biking app , Julian sets the simulated biker to a speed of 20/km/h
To find : Julian's average speed
Solution:
Julian sets the simulated biker to a speed of 20/km/h
time = 15 mins = 1/4 hr
Distance Covered as Per Simulated Biker = 20 * 1/4 = 5 km
Julians app reports a position of -2 1/4 = - 2.25 km
=> Julian is 2.25 km behind 5 km
=> Actual Distance Covered = 5 - 2.25 = 2.75 km
Julian Average Speed = 2.75 /(1/4)
= 11 km / hr
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Answered by
5
Answer:
11 km
Step-by-step explanation:
i saw the answer on khan
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