数学篇：SAT考试每日一题 2

>>SAT考试：数学篇：SAT考试每日一题（2）

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

Anna spent 3 hours in her garden planting 6 rosebushes. To plant a rosebush, she first dug ahole then refilled the hole with the root ball, dirt, and compost. She spent twice as long diggingthe hole for each plant as she did refilling it. Which of the following could be used to find thenumber of minutes, m, Anna spent digging each hole?

A.6m+6(2m)=3

B.6m+6(m/2)=3

C.6m+6(2m)=180

D.6m+6(m/2)=180

答案：D

解析：

Option D is correct. Since m represents the number of minutes spent digging a hole for a single rosebush, then Anna spent 6m minutes digging holes for all 6 rosebushes. Since Anna spent half the time refilling each hole as digging each hole, she spent m/2 minutes refilling each hole and 6(m/2) minutes refilling all the holes.

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