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1) Nicholas drove from Town P to Town Q. He took 2 hours to travel 3/5 of
the trip. He took another 1 hour to travel the remaining trip at an average
speed of 60 km/h. Find his average speed for the whole trip.


Please add the units at the end of the answer.

Respuesta :

anwser: 31.5



step by step explanation:
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The average speed for the whole trip is required.

The average speed of the car is 100 km/h.

Let [tex]x[/tex] be the total distance of the trip.

Distance traveled for 2nd half

[tex]60\times 1=60\ \text{km}[/tex]

[tex]x-\dfrac{3}{5}x=60\\\Rightarrow \dfrac{1}{5}x=60\\\Rightarrow x=300\ \text{km}[/tex]

Total time

[tex]t=2+1=3\ \text{hours}[/tex]

Average speed is given by

[tex]v=\dfrac{300}{3}\\\Rightarrow v=100\ \text{km/h}[/tex]

The average speed of the car is 100 km/h.

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