# A man drove his car northward,then turned left and drove 10 km and again turned left and drove 20 km. He found himself 10 km west of his starting point. How far did he drive northward initially?

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by kapil3

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by kapil3

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now, drove 10 km left,

means now he is heading west

now drove left 20 km left,

means now he is heading south,

but he was found himself 10 km west from starting,

you can see the picture.