If a man starts at 7 a.m. at 5 4 \frac{5}{4} 4 5 of his usual speed, he reaches the office 30 minutes earlier than usual. At this new speed, at what...
Question
If a man starts at 7 a.m. at
of his usual speed, he reaches the office 30 minutes earlier than usual. At this new speed, at what time does he reach his office?