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8th Class Mathematics Sample Paper Mathematics Sample Paper - 2

  • question_answer
    The area of a rectangular field is 48 m2 and one of its sides is 6 m. How long will a lady take to cross the field diagonally at the rate of 20 m/minute?

    Answer:

    Area of rectangular field
                                                                                                                                       \[=\text{ }48\text{ }{{m}^{2}}\]
    One side = 6 m
    Other side 
                                                                                \[=\frac{48}{6}=8\]
    m.       
    Diagonal of rectangle
                                                                                \[=\text{ }\sqrt{{{8}^{2}}+{{6}^{2}}}\]
                                                                             \[=\text{ }\sqrt{64+36}\]
    = 10 m
    Lady covers 20 m in 1 minute
    Lady will cover 10 m in
                                                                                      \[\frac{1}{2}\]
    min. or 30 sec.


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