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An express train traveled at an average speed of 100 kilometers per ho
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14 Nov 2022, 03:57
14 Nov 2022, 03:57
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Question Stats:
75% (03:01) correct
25% (03:14) wrong based on 16 sessions
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An express train traveled at an average speed of 100 kilometers per hour, stopping for 3 minutes after every 75 kilometers. A local train traveled at an average speed of 50 kilometers, stopping for 1 minute after every 25 kilometers. If the trains began traveling at the same time, how many kilometers did the local train travel in the time it took the express train to travel 600 kilometers?
a. 300
b. 305
c. 307.5
d. 1200
e. 1236
a. 300
b. 305
c. 307.5
d. 1200
e. 1236
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Joined: 20 Feb 2017
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Re: An express train traveled at an average speed of 100 kilometers per ho
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14 Nov 2022, 07:37
14 Nov 2022, 07:37
2
Expert Reply
Time for express train to travel 600 km =
600km/100kmh = 6 hours
600km/75 = 8 (7 stops + 1 for crossing the finish line)
total time = 6 hours 21 minutes
Distance traveled by local train in 6 hours 21 minutes:
300 km in 6 hours 12 minutes (6 hours of travel, 12 stops at 1 minute each)
so how far will it go in last 9 minutes?
9/60(50) = 9(50)/60 = 450/60 = 7.5
307.5 km in 6 hours 21 minutes
Answer: C
600km/100kmh = 6 hours
600km/75 = 8 (7 stops + 1 for crossing the finish line)
total time = 6 hours 21 minutes
Distance traveled by local train in 6 hours 21 minutes:
300 km in 6 hours 12 minutes (6 hours of travel, 12 stops at 1 minute each)
so how far will it go in last 9 minutes?
9/60(50) = 9(50)/60 = 450/60 = 7.5
307.5 km in 6 hours 21 minutes
Answer: C
Re: An express train traveled at an average speed of 100 kilometers per ho
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05 Aug 2024, 08:43
05 Aug 2024, 08:43
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