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10th Class Mathematics Coordinate Geometry Question Bank Coordinate Geometry

  • question_answer
    To raise social awareness about the hazards of smoking, a school decided to start "No smoking campaign". A student is asked to prepare a campaign banner in the shape of a triangle shown in the figure. If cost of \[1\text{ }c{{m}^{2}}\]of banner is Rs. 2, find the cost of the banner.

    A)  Rs.12             

    B)  Rs.6   

    C)  Rs.5  

    D)         Rs.10 

    Correct Answer: D

    Solution :

    Area of banner \[=\frac{1}{2}|[7(1-1)+1(1-3)+6(3-1)]=5c{{m}^{2}}\] Cost of \[1c{{m}^{2}}\]of banner = Rs. 2 \[\therefore \]    Cost of Cost of \[5\,c{{m}^{2}}\]of banner of banner = \[2\times 5=Rs.10\]


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