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7th Class Mathematics Simple Equations Question Bank Simple Equations

  • question_answer
    In a coconut grove, \[(x+2)\] trees yield 60 coconuts per year, x trees yield 120 coconuts per year and \[(x-2)\] trees yield 180 coconuts per year. If the average yield per year per tree is 100, find x.

    A)  \[4\]                      

    B)         \[3\]

    C)  \[2\]                    

    D)         \[1\]

    Correct Answer: A

    Solution :

       The average yield par tree per year \[=\frac{(x+2)\times 60+x\times 120+(x-2)\times 180}{(x+2+x+x-2)}\] \[\Rightarrow \]  \[60x=240\Rightarrow x=4\]


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