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A topographer calculates the width of a river by the following method: It stops directly in...

A topographer calculates the width of a river by the following method: It stops directly in front of a tree on the opposite side and walks 100 m along the river bank, then looks at the tree. The angle formed by the line that starts from it and ends in the tree is 35 °. What is the width of the river? (Solve the problem using the analytical method of vector addition)

a)29.9

b)142.8

c)70.1

d)110.5

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