SAT考试9月每日精选题3

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Mathematics>Standard Multiple Choice

Read the following sat test question and thenclick on a button to select your answer.

Sarah has a rectangular swimming pool thatmeasures 12 feet(ft) by 72ft across the surface. Tothe nearest foot, what is the diagonal distance across the surface of the pool?

A.60ft

B.71ft

C.73ft

D.84ft

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答案：C

解析：

Choice C is correct. The Pythagorean theorem can be used to calculate the diagonal length of the swimming pool surface where a and b are the side lengths of the pool surface.

c²=a²+b²=12²+72²=5328, c≈±73

A negative distance is not possible in this context, so the diagonal distance across the swimming pool surface is about 73ft.

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