swerve wrote: ↑Tue Mar 31, 2020 10:20 am
Bob drives at an average rate of 50 mph from Berkeley to Los Angeles, a distance of 350 miles. How long does it take him to complete the trip?
A. 4 hrs
B. 5 hrs
C. 7 hrs
D. 10 hrs
E. 12 hrs
The OA is
C
Source: Magoosh
APPROACH #1: Formula
travel time = distance/speed = 350/50 = 7 hours
Answer: C
APPROACH #2: common sense
Bob's speed is 50 miles per hour.
In other words, for every 1 hour that elapses, Bob travels 50 miles
So, after
1 hour of traveling, Bob has traveled
50 miles
After
2 hours of traveling, Bob has traveled
100 miles
After
3 hours of traveling, Bob has traveled
150 miles
After
4 hours of traveling, Bob has traveled
200 miles
After
5 hours of traveling, Bob has traveled
250 miles
After
6 hours of traveling, Bob has traveled
300 miles
After 7 hours of traveling, Bob has traveled 350 miles
Answer: C
Cheers,
Brent
