Tanya walks 15 km towards North. From there she walks 9 km towards South. Then, she walks 8 km towards East. How far is she from her starting point?
PR = (PQ – QR) = (15 – 9) = 6 km RS = 8 km So, Tanya’s distance from starting point P = √ 6 ² + 8 ² = √ 36 + 64 = √ 100 = 10 Km.
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