GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Two cars started from the same point and traveled on a strai
[#permalink]
02 Jan 2021, 02:19
02 Jan 2021, 02:19
Expert Reply
1
Bookmarks
00:00
Question Stats:
89% (01:27) correct
10% (02:42) wrong based on 19 sessions
Hide Show timer Statistics
Two cars started from the same point and traveled on a straight course in opposite directions for exactly three hours, at which time they were 330 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 three-hour trip?
Show: :: OA
50
Re: Two cars started from the same point and traveled on a strai
[#permalink]
02 Jan 2021, 08:26
02 Jan 2021, 08:26
1
Total distance traveled = 330 miles
Total time = 3 hrs
110 km in 1 hr traveled by both car together.
The cars are in opposite direction so the speed will be added.
Relative speed = A + B (A=car 1 & B=car 2)
in 1 hr distance will be A + B = 110
It is given that ( one car traveled, on average, 10 miles per hour faster than the other car ) so B = A + 10
A + A + 10 = 110
A = 50 & B = 60
Answer 50
Total time = 3 hrs
110 km in 1 hr traveled by both car together.
The cars are in opposite direction so the speed will be added.
Relative speed = A + B (A=car 1 & B=car 2)
in 1 hr distance will be A + B = 110
It is given that ( one car traveled, on average, 10 miles per hour faster than the other car ) so B = A + 10
A + A + 10 = 110
A = 50 & B = 60
Answer 50
Two cars started from the same point and traveled on a strai
[#permalink]
19 Feb 2021, 11:04
19 Feb 2021, 11:04
1
Total distance traveled = 330 miles
Total time = 3 hours
Speed of car A=X
Speed of car B=X+10
Total Distance=speed x time
As they are moving away from the point in opposite direction. so, we add there speed .
330=X+(X+10) x3
300/3 =X+(X+10)
110=X+X+10
110-10=2X
100=2X
X=50
Answer is 50
Total time = 3 hours
Speed of car A=X
Speed of car B=X+10
Total Distance=speed x time
As they are moving away from the point in opposite direction. so, we add there speed .
330=X+(X+10) x3
300/3 =X+(X+10)
110=X+X+10
110-10=2X
100=2X
X=50
Answer is 50
