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 kmh20\,\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
1515
15
15
minutes, Julian's app reports a position of
−214 km-2\dfrac{1}{4}\,\text{km}
−2
4
1
km
minus, 2, start fraction, 1, divided by, 4, end fraction, start text, k, m, end text
.
What has Julian's average speed been so far?
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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 kmh20\,\dfrac{\text{km}}{\text{h}}
20 h km
Step-by-step explanation:
Julian adjusts the simulated biker to a speed of 20/km/h
time = 15 mins = 1/4 hr
Distance Covered according to the Simulated Biker = 20 * 1/4
= 5 km
Julian's app detects a position of -2 1/4
= - 2.25 km
Real Distance Covered = 5 - 2.25
= 2.75 km
Julian's Average Speed = 2.75 /(1/4)
= 11 km / hr
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