The current of a river is 2 miles per hour. A boat travels to a point 6 miles upstream and back in 4 hours. What is the speed of
1 answer:
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9514 1404 393
Answer:
C
Step-by-step explanation:
The net diagram shows two triangles and three rectangles. The relevant area formulas are ...
A = 1/2bh . . . . . . area of a triangle
A = bh . . . . . . . . area of a rectangle
The two triangles are shown with a base of 4 and a height of 3 1/2, so you expect the area expression to have a term that looks like ...
2(1/2 × 4 × 3 1/2)
The three rectangles are shown with dimensions 8 and 4, so you expect the area expression to have at term that looks like ...
3(4 × 8)
Only one of the area expressions has both of these terms: the third choice.
