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A 500 ft long train crosses a platform 700 feet in 10 seconds. So what is the speed of that train? |

A) 70 ft/s
B) 85 ft/s
C) 100 ft/s
D) 120 ft/s
Correct Answer :120 ft/s Explanation :Speed of the train = Length of (train+platform)/Time = 500+700 / 10 = 120 ft/ sec |

A passenger train departs from Delhi at 6 p.m. for Mumbai. At 9 p.m. an express train, whose average speed exceeds that of the passenger train by 15 km / hour leaves Mumbai for Delhi. Two trains meet each other mid-route. At what time do they meet, given that the distance between the cities is 1080 km? |

A) 4 p.m. B) 2 a.m. C) 12 mid-night D) 6 a.m. Correct Answer :6 a.m. Explanation :Let the speed of passenger train= x km/hr 6pm#-----540-----#-----540-----#9pm (540 / x) - (540 / x + 15) = 3 [6 pm - 9 pm ] Time taken by passenger train to reach the meeting point = 540/x = 540/45 = 12 Hrs Therefore, Both train will meet at (6 pm + 12 Hrs) = 6 a.m. |

A 225 m long train is running at a speed of 30 km / hour. How much time does it take to cross a man running at 3 km / hour in the same direction? |

A) 40 seconds B) 30 seconds C) 25 seconds D) 15 seconds Correct Answer :30 seconds Explanation :Relative Speed, in the same direction= Speed of train - Speed of man Time taken to cross the man = Distance/ Relative Speed |

The distance between two cities (M and N) is 569 km. A train starts from city M at 8 am and travel towards city N @ 53 km per hour. Another train starts from city N at 9 am and travel towards city M @ 76 km per hour. At what time will the trains meet? |

A) 12:30 pm B) 1:00 pm C) 2:30 pm D) 1:00 pm Correct Answer :1:00 pm Explanation :Total distance between M and N= 569 km First train leaves station at 8:00 am and second at 9:00 am. So first train i.e., So, distance left between the stations = 569 − 53 = 516 km trains are travelling in opposite directions. So, relative speed of trains = 53 + 76 = 129 km/h Now, Time taken to cover 519 km = 519/129= 4 hours Hence the time, at which both the trains will meet, is 4 hour after second train left i.e., 9:00 am + 4 h = 1:00 pm |