An engineer wanted to approximate the width, in feet (ft), of a river. She placed markers at point A and point B to represent the average width of the river. She also placed 3 other markers along the riverbank and measured the distances shown in the diagram below.
Based on this diagram, what was the width of the river, in feet (ft), from point A to point B?
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Question

An engineer wanted to approximate the width, in feet (ft), of a river. She placed markers at point A and point B to represent the average width of the river. She also placed 3 other markers along the riverbank and measured the distances shown in the diagram below.
Based on this diagram, what was the width of the river, in feet (ft), from point A to point B?
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anonymous · Answer

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anonymous · Answer

The triangles in the figure are similar.So the sides are in proportion.Let x be the width of the river.
=> (x+49)/93 = x/62 . 62x + 3038 = 93x , 31x = 3038 , x = 98 ft. 
The width of the river is 98 ft.