Question 30
John usually takes 20 minutes to walk from home to school. This morning, on his way to school, Tom realizes he has forgotten his mathematics exercise book. Continuing would bring him 8 minutes early; returning home for the book and then going straight to school would make him 10 minutes late. Retrieving the book takes negligible time. What fraction of the home-to-school distance has Tom already walked?
Original options (preserved):
A. 0.4
B. 0.45
C. 0.5
D. 0.55
E. 0.6
Editorial note: Discuss the name mismatch and give the result under the intended one-person interpretation.
Original options (preserved):
A. 0.4
B. 0.45
C. 0.5
D. 0.55
E. 0.6
Editorial note: Discuss the name mismatch and give the result under the intended one-person interpretation.