GMAT Quant  Speed, Time & Distance, Races
You may get one to two questions from Rates  speed, distance, time and races in the GMAT quant section  in both variants viz., problem solving and data sufficiency. The concepts tested include computing distance, speed, time, relative speed, average speed, speed of boats in streams, speed of aircrafts with tailwind. A collection of GMAT practice questions from speed, distance and time is given below. Attempt these questions and check whether you have got the correct answer. If you have not go to the explanatory answer or the video explanations (wherever provided) to learn how to crack the question.
A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 18 seconds. What is the length of the platform in meters?
 240 meters
 360 meters
 420 meters
 600 meters
 Cannot be determined
 Correct AnswerChoice (A).
The length of the train is 240 meters. Correct answer  Explanatory Answer
 Length of train
 Easy
A train traveling at 100 kmph overtakes a motorbike traveling at 64 kmph in 40 seconds. What is the length of the train in meters?
 1777 meters
 1822 meters
 400 meters
 1111 meters
 None of these
 Correct AnswerChoice (C).
The length of the train is 400 meters. Correct answer  Explanatory Answer
 Length of train
 Easy
Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Jim's travel in mph?
 42 mph
 36 mph
 37.5 mph
 42.5 mph
 48 mph
 Correct AnswerChoice (C).
Jim's average speed of travel is 37.5 mph. Correct answer  Explanatory Answer
 Average Speed
 Easy
A runs 25% faster than B and is able to allow B a lead of 7 meters to end a race in dead heat. What is the length of the race?
 10 meters
 25 meters
 45 meters
 15 meters
 35 meters
 Correct AnswerChoice (E).
The length of the race is 35 meters. Correct answer  Explanatory Answer
 Race
 Medium
Jane covered a distance of 340 miles between city A and city B taking a total of 5 hours. If part of the distance was covered at 60 miles per hour speed and the balance at 80 miles per hour speed, how many hours did she travel at 60 miles per hour?
 2 hours 30 minutes
 3 hours
 2 hours
 1 hour 45 minutes
 None of these
 Correct AnswerChoice (B).
Jane travelled for 3 hours @ 60 mph. Correct answer  Explanatory Answer
 Speed and Time
 Easy
Steve traveled the first 2 hours of his journey at 40 mph and the last 3 hours of his journey at 80 mph. What is his average speed of travel for the entire journey?
 60 mph
 56.67 mph
 53.33 mph
 64 mph
 66.67 mph
 Correct AnswerChoice (D).
Steve's average speed for the entire journey is 64 mph. Correct answer  Explanatory Answer
 Average Speed
 Easy
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