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Caitlin lives in Wollongong and travels to Sydney daily.
The car trip requires her to travel at different speeds. Most often she travels 30 kilometres at
60 km/h and 40 kilometres at 100 km/h. what is her average speed

Respuesta :

dionissenjo16

Answer:

Step-by-step explanation:

We can find out how much time it took Caitlin to drive each distance an then find the average:

30/60 = 1/2  30 minutes

40/100 = 2/5 = 24 minutes

We can divide 30 minutes into 5 6 minute pieces and 24 minutes into 4 6 minutes pieces to get:

[tex]\frac{60+60+60+60+60+100+100+100+100}{9}[/tex]

[tex]\frac{700}{9}[/tex]

[tex]77.\rp777777[/tex] km/h

Her average speed is around 77.8 km/h.

Solution: 77.8 km/h

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