Q:

A) 130 | B) 360 |

C) 500 | D) 540 |

Answer: C) 500

Explanation:

Explanation:

Speed =[ 78 x ( 5/18 ) ] m/sec = 65/3 m/sec.

Time = 1 minute = 60 sec.

Let the length of the tunnel be x metres.

Then, [ (800 + x )/ 60 ]= 65/3

3(800 + x) = 3900

x = 500.

2
765

Q:

A) 140 m | B) 240 m |

C) 160 m | D) 180 m |

7
964

Q:

A) 10:00 | B) 11:00 |

C) 11:30 | D) 12:30 |

3
603

4
534

Q:

A) 12 kmph | B) 6 kmph |

C) 10 kmph | D) 8 kmph |

5
591

Q:

A) 280 km | B) 105 km |

C) 70 km | D) 140 km |

2
722

Q:

A) 62 kmph | B) 64 kmph |

C) 65 kmph | D) 70 kmph |

3
616

Q:

A) 75 kmph | B) 72 kmph |

C) 69 kmph | D) 66 kmph |

5
680