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7th Class Mathematics Simple Equations Question Bank Linear Equation in one Variable

  • question_answer
    In the see-saw shown below, the boy on the left weights '5K' kg whereas his friends on the right weight '60-5K' the; so that boy on the left weighs:

    A)  40                               

    B)  30

    C)  20                               

    D)  10

    Correct Answer: B

    Solution :

    (b) \[5K=60-5K\Rightarrow 10K=60\Rightarrow K=6\] \[\therefore \,\,5K=30\] (weight of boy on left)


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