Question

    A bus travels 40km north from stand. It turns right and

    travels 80km, then turns right and travels 100km. How far is the bus from the stand (minimum possible distance) and in which direction?
    A 30√2, North East Correct Answer Incorrect Answer
    B 10 km, South East Correct Answer Incorrect Answer
    C 100 km, South East Correct Answer Incorrect Answer
    D 50 km, North East Correct Answer Incorrect Answer

    Solution

    AC = BD = 80 Km DE = CD + CE => CE = 100 – 40 = 60 Km AE = √(CE²+AC²) AE = √(60²+80²) AE = √(3600+6400) = √10000 = 100 km Direction is South East.

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