Two cyclists depart from the same point. One travels due East at 18 km/h while the other travels North-West at 20 Km/h. How long (to the nearest minute) will it be before they are 80 Km apart?

Question

katielong · Answer

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are you aware of the suvat equations?

katielong · Answer

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katielong · Answer

find the velocity of the 80m distance line by using the cosine rule, then if you have the distance and the velocity you can work out the time y

anonymous · Answer

that was a good hint did you get answers ?  velocity =35.11 km/hr
so time  80/35.11 =2.28 hrs