Four mines A B C and D are located along a...

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Four mines A, B, C and D are located along a road as shown with production in Mt per year 1, 2, 1 and 3 respectively. In order to handle total coal produced. the ideal distance of a coal washery along the road from the mine A in Km is

A. 4.01

B. 3.91

C. 3.81

D. 3.71

Answer: Option D

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