alleryA boy walking at 5 km/h is 6 minutes late, but at 6 km/h he is 6 minutes early. How far is his destination?
A4 km
B6 km
C8 km
D5 km
Answer & Solution
Correct answer: B. 6 km
d/5 - d/6 = 12 min = 0.2 h gives d/30 = 0.2, so d = 6 km.
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