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    The length of a rectangular solar panel is 5% more than its breadth. If the area of the solar panel is 210 m², find its breadth.
    Question

    The length of a rectangular solar panel is 5% more than its breadth. If the area of the solar panel is 210 m², find its breadth.

    A.

    210 m

    B.

    20√2 m

    C.

    10√2 m

    D.

    10 m

    Correct option is C

    Given:
    The length of the solar panel is 5% more than its breadth.
    The area of the solar panel is 210 m².
    Formula Used:
    Area of a rectangle = Length × Breadth
    Solution:
    Let the breadth of the solar panel be b meters, and the length be l meters.
    Since the length is 5% more than the breadth, So,
    l = b + 0.05b = 1.05b
    Now, Using the formula for the area of a rectangle:
    l × b = 210
    1.05b × b = 210
    1.05b2=210b2=2101.05=2001.05b^2 = 210 \\b^2 = \frac{210}{1.05} = 200 \\​​
    b=200=102 metersb = \sqrt{200} = 10 \sqrt 2 \, \text{meters}  ​

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