Mathematics: Steve goes on a 40-km bike ride. he covers the first half of the distance averaging a speed of 15 km/hr. in order to average 20 km/hr for the entire trip, how many kilometers per hour must his average speed be during the second half of the trip?

No it is not linear because, the x value has two 2s with different y values....

Steve goes on a 40-km bike ride. he covers the first

Ответ:

tomoetoes6910

10.09.2020

Mathematics

Speed required to cover second half of distance = 30 km/hr

Step-by-step explanation:

Total distance Steve traveled = 40 km

He covers the first half of the distance averaging a speed of 15 km/hr.

So he covers 20 km at a speed of 15 km/hr.

$\texttt{Time taken to cover first half = }\frac{20}{15}=1.33 hours$

We need to find in order to average 20 km/hr for the entire trip , how many kilometers per hour must his average speed be during the second half of the trip.

$\texttt{Total time taken = }\frac{40}{25}=2 hours$

So he need to cover second half distance in (2 - 1.33) hours = 0.67 hours.

$\texttt{Speed required = }\frac{20}{0.67}=30 km/hr$

Speed required to cover second half of distance = 30 km/hr

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Steve goes on a 40-km bike ride. he covers the first half of the distance averaging a speed of 15 km/hr. in order to average 20 km/hr for the entire trip, how many kilometers per hour must his average speed be during the second half of the trip?

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