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A boy stands at A in a field at a distance 600 m from the road BC. In the field he can walk at 1 m/s while on the road at 2 m/s. He can walk in the field along AD and on the road along DC so as to reach the destination C (Fig. 1.3). What should be his route so that he can reach the destination in the least time and determine the time. |
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