Mr and Mrs Porter drove down to see Sweeney. Mr Porter drove the first 20km on the way there, and Mrs Porter drove the rest of the way. On the return journey, she drove the first 30km and he drove the rest. How much farther did Mrs Porter drive than Mr Porter?
Correct answer: C. 20km
- A. No farther
- B. 10km
- C. 20km
- D. There is not enough information to work it out
Explanation
Mrs Porter drove 10km farther than Mr Porter. On the way there, Mr Porter drove 20km and Mrs Porter drove 30km on the return journey. Therefore, Mrs Porter drove 10km more than Mr Porter in total. Option A is incorrect because Mrs Porter did drive farther. Option B is incorrect as Mrs Porter drove farther than 10km. Option D is incorrect as there is sufficient information in the question to calculate the difference in distances driven.
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