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26 Oct 2020, 10:29
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B
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Difficulty:
15%
(low)
Question Stats:
82% (01:43) correct
18%
(01:48)
wrong
based on 171
sessions
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Two cars started from the same point and traveled on a straight course in opposite directions for exactly 3 hours, at which time they were 300 miles apart. If one car traveled, on average, 10 miles per hour faster than the other car, what was the average speed of the slower car for the 3-hour trip?
A. 40 miles per hour
B. 45 miles per hour
C. 50 miles per hour
D. 55 miles per hour
E. 60 miles per hour
A. 40 miles per hour
B. 45 miles per hour
C. 50 miles per hour
D. 55 miles per hour
E. 60 miles per hour
26 Oct 2020, 11:20
Kudos
Bookmarks
Two cars started from the same point and traveled on a straight course in opposite directions for exactly 3 hours, at which time they were 300 miles apart. If one car traveled, on average, 10 miles per hour faster than the other car, what was the average speed of the slower car for the 3-hour trip?
A. 40 miles per hour
B. 45 miles per hour
C. 50 miles per hour
D. 55 miles per hour
E. 60 miles per hour
speed of both car v and v+10
distance after 3 hours , 3v + (v+10) * 3 = 300
6v + 30 = 300
6v = 270
v= 45
Answer B
A. 40 miles per hour
B. 45 miles per hour
C. 50 miles per hour
D. 55 miles per hour
E. 60 miles per hour
speed of both car v and v+10
distance after 3 hours , 3v + (v+10) * 3 = 300
6v + 30 = 300
6v = 270
v= 45
Answer B
