Home
Class 14
MATHS
The speed of a boat in still water is 18...

The speed of a boat in still water is 18 km/h and the speed of the current is 6 km/h. In how much time (in hours) will the boat travel a distance of 90 km up stream and the same distance downstream ?

A

`9 1/2`

B

`11 1/4`

C

12

D

10

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • 2018 TIER-II PAPER(4)

    CHAMPION PUBLICATION|Exercise EXERCISE|100 Videos
  • 2018 TIER-II PAPER(6)

    CHAMPION PUBLICATION|Exercise EXERCISE|100 Videos

Similar Questions

Explore conceptually related problems

Speed of a boat in still water is 10 km/h and the speed of the stream is 5 km/h. Find the total time taken to travel a distance of 20 km upstream and 30 km downstream

If the speed of a boat in still water is 8 km/h and the rate of stream is 4 km/h, then find upstream speed of the boat.

CHAMPION PUBLICATION-2018 TIER-II PAPER(5)-EXERCISE
  1. A solid metallic sphere of radius 8 cm is melted and drawn into a wire...

    Text Solution

    |

  2. The sides of a triangle are 56 cm, 90 cm and 106 cm. The circumference...

    Text Solution

    |

  3. The speed of a boat in still water is 18 km/h and the speed of the cur...

    Text Solution

    |

  4. The HCF of two numbers is 21 and their LCM is 221 times the HCF. If on...

    Text Solution

    |

  5. If two medians BE and CF of a triangle ABC , intersect each other at G...

    Text Solution

    |

  6. The value of tan^2 theta + cot^2 theta - sec^2 theta cosec^2 theta is ...

    Text Solution

    |

  7. The point of intersection of the graphs of the equations 3x-5y=19 and ...

    Text Solution

    |

  8. (sec theta-tan theta)^2 (1+sin theta)^2 div sin^2 theta

    Text Solution

    |

  9. By selling two articles for Rs 800, a person gains the cost price of t...

    Text Solution

    |

  10. What is the compound interest on a sum of Rs 7200 for 2(2/5) years at ...

    Text Solution

    |

  11. The value of ((0.545)(0.081)(0.51)(5.2))/ ((0.324)^3+(0.221)^3-(0.545)...

    Text Solution

    |

  12. The base of a right pyramid is an equilateral triangle with side 8 cm,...

    Text Solution

    |

  13. The sum of the interior angles of a regular polygon is 1260^@.What is ...

    Text Solution

    |

  14. In a circle with centre O, AC and BD are two chords. AC and BD meet at...

    Text Solution

    |

  15. In triangle ABC , the perpendiculars drawn from A, B and C meet the op...

    Text Solution

    |

  16. The perimeter of triangle ABC and triangle DEF are 43.2 cm and 28.8 cm...

    Text Solution

    |

  17. If the diameter of the base of a right circular cylinder is reduced by...

    Text Solution

    |

  18. A right circular solid cone of radius 3.2 cm and height 7.2 cm is melt...

    Text Solution

    |

  19. 40 litres of 60% concentration of acid solution is added to 35 litres ...

    Text Solution

    |

  20. In triangle PQR, I is the incentre of the triangle. If angle QIR = 107...

    Text Solution

    |