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3.
A walks 10 metres in front and 10 metres to the right. Then every time
turning to his left, he walks 5, 15 and 15 metres respectively. How far
is he now from his starting point?[/b]
(a) [/i]5 metres
(b) 10 metres
(c) 15 metres
(d) 20 metres
(e) 23 metres
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