Q:

A) 36 kmph | B) 35 kmph |

C) 72 kmph | D) 70 kmph |

Answer: D) 70 kmph

Explanation:

Explanation:

By car 240 km at 60 kmph

Time taken = 240/60 = 4 hr.

By train 240 km at 60 kmph

Time taken = 400/100 = 4 hr.

By bus 240 km at 60 kmph

Time taken = 200/50 = 4 hr.

So total time = 4 + 4 + 4 = 12 hr.

and total speed = 240+400+200 = 840 km

Average speed of the whole journey = 840/12 = 70 kmph.

0
72

Q:

A) 17.5 km | B) 24.5 km |

C) 21 km | D) 28 km |

0
209

Q:

A) 1 hour | B) 1 hour 30 minutes |

C) 2 hours 30 minutes | D) 2 hours |

0
121

Q:

A) 2.07 ms-1 | B) 2.60 ms-1 |

C) 3.67 ms-1 | D) 2.67 ms-1 |

0
140

0
110

Q:

A) 40 km | B) 20 km |

C) 30 km | D) 48 km |

2
177

0
167

Q:

A) 40 kmph | B) 60 kmph |

C) 30 kmph | D) 50 kmph |

1
109