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.

3
1033

6
1050

Q:

A) 2 hours | B) 6 hours |

C) 3 hours | D) 4 hours |

2
934

0
895

Q:

A) 245 and 54 | B) 255 and 40 |

C) 255 and 36 | D) 245 and 45 |

0
871

Q:

A) 5.76 m/s | B) 7.76 m/s |

C) 6.76 m/s | D) 4.76 m/s |

1
744

2
763

Q:

A) 140 km/h | B) 105 km/h |

C) 70 km/h | D) 280 km/h |

0
765