The town of Bracknaw is due west of Arley. Chris, in an ultralight plane, starts at athird town, Champton, which is due north of Bracknaw, and flies directly towards Arleyat a speed of 40 km/h in a direction of 110°T. She reaches Arley in 3 hours.
Find:
a) the distance between Arley and Bracknaw
b) the time to complete the journey from Champton to Bracknaw, via Arley, if she increases her speed to 45 km/h between Arley and Bracknaw.

Question

The town of Bracknaw is due west of Arley. Chris, in an ultralight plane, starts at athird town, Champton, which is due north of Bracknaw, and flies directly towards Arleyat a speed of 40 km/h in a direction of 110°T. She reaches Arley in 3 hours. 
Find:
a) the distance between Arley and Bracknaw
b) the time to complete the journey from Champton to Bracknaw, via Arley, if she increases her speed to 45 km/h between Arley and Bracknaw.

anonymous · Answer

Draw a sketch.