I walk 12 km to the North, then 10 kilometres East and then 12 km South. How far am I from the starting point ?
Let I start from point A and walk 12 km to the North, then 10 kilometres East to reach C and then 12 km South to finally stop at point D.
$$\therefore$$ I am 10 km east of the starting point.
=> Ans - (D)
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