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Two stations A and B are 100 km apart on a straight line. One train
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08 Mar 2021, 00:07
08 Mar 2021, 00:07
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Question Stats:
75% (01:06) correct
25% (02:55) wrong based on 8 sessions
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Two stations A and B are 110 km apart on a straight line. One train starts from A at 7:00 AM and travel towards B at 20 kmph. Another train starts from B at 8:00 AM and travel towards A at 25 kmph. At what time they will meet?
A. 09:00 AM
B. 09:30 AM
C. 10:00 AM
D. 10:30 AM
E. 11:00 AM
A. 09:00 AM
B. 09:30 AM
C. 10:00 AM
D. 10:30 AM
E. 11:00 AM
Re: Two stations A and B are 100 km apart on a straight line. One train
[#permalink]
08 Mar 2021, 02:17
08 Mar 2021, 02:17
1
9:30 AM?
Since total is 100 Km and A started early so minus 20 Km.
Now A and B travel 80Km towards each other, so total speed = (20+25)kmh
Time =Distance/Speed = 80/55 = 1.45 = 1 hour 27 min
Time they meet = 8AM + 1 hr 27min = 9:30 AM approx
Since total is 100 Km and A started early so minus 20 Km.
Now A and B travel 80Km towards each other, so total speed = (20+25)kmh
Time =Distance/Speed = 80/55 = 1.45 = 1 hour 27 min
Time they meet = 8AM + 1 hr 27min = 9:30 AM approx
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Given Kudos: 172
Location: India
WE:Education (Education)
Re: Two stations A and B are 100 km apart on a straight line. One train
[#permalink]
08 Mar 2021, 02:29
08 Mar 2021, 02:29
sprincej wrote:
9:30 AM?
Since total is 100 Km and A started early so minus 20 Km.
Now A and B travel 80Km towards each other, so total speed = (20+25)kmh
Time =Distance/Speed = 80/55 = 1.45 = 1 hour 27 min
Time they meet = 8AM + 1 hr 27min = 9:30 AM approx
Since total is 100 Km and A started early so minus 20 Km.
Now A and B travel 80Km towards each other, so total speed = (20+25)kmh
Time =Distance/Speed = 80/55 = 1.45 = 1 hour 27 min
Time they meet = 8AM + 1 hr 27min = 9:30 AM approx
My bad, the distance must be 110 km for these option choices.
I have made the required changes, thanks
