8th Class Mathematics Menstruation Question Bank Mensuration

  • question_answer Area of four walls of a room is\[\frac{5}{2}(8+5\sqrt{3})sq.cm\]. The length and breadth of the room are 7.5 m and 3.5m, respectively. The height of the room is:                                          

    A) 7.7m                           

    B) 3.5m    

    C) 6.77m                         

    D) 5.4m   

    Correct Answer: B

    Solution :

    Let h be the height of the room in meter, then Area of four walls \[5\sqrt{3}\] \[c{{m}^{2}}\] \[c{{m}^{2}}\] \[\frac{77}{2}\]\[c{{m}^{2}}\] \[\frac{25\pi }{3}\]            

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