A walks 10metres towards East and then 10metres to his right. Then every time turning to his left, he walks 5,
A walks 10metres towards East and then 10metres to his right. Then every time turning to his left, he walks 5, 15 and 15metres respectively. How far is he now from his starting point?
(A) 5metres
(B) 10metres
(C) 15metres
(D) 20metres
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