Q:

A) 15 h | B) 16 h |

C) 8 h | D) 20 h |

Answer: B) 16 h

Explanation:

Explanation:

If t1 and t2 are the upstream and down stream times. Then time taken in still water is given by

$\frac{2\times t1\times t2}{t1+t2}=\frac{2\times 12\times 24}{36}=16h$

Q:

A) 2(2 + √17) | B) 3(2 + √17) |

C) 2(4 + √15) | D) 3(4 + √17) |

0
809

Q:

A) 0.20 Hz | B) 625 Hz |

C) 250 Hz | D) 100 Hz |

1
903

1
907

0
1108

Q:

A) 4 kmph | B) 2 kmph |

C) 3 kmph | D) 1 kmph |

1
1133

4
1728

1
1450

Q:

A) 75 kmph | B) 70 kmph |

C) 60 kmph | D) 65 kmph |

3
1793