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Magoosh - 数学DS - 38
Robin drove from Townville to Villageton. Upon arriving in Villageton, she immediately returned to Townville. What was Robin`s average speed for the entire trip?

(1) While driving from Townville to Villageton, Robin`s average speed was 40 miles per hour. While driving from Villageton to Townville, Robin`s average speed was 60 miles per hour.

(2) The distance from Townville to Villageton is 120 miles
  • AStatement 1 ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient.
  • BStatement 2 ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient.
  • CBOTH statements 1 and 2 TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient.
  • DEach statement ALONE is sufficient to answer the question.
  • EStatement 1 and 2 TOGETHER are NOT sufficient to answer the question.
显示答案
正确答案: A

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