4th Class Mathematics Area, Perimeter and Volume Question Bank Perimeter & Area

  • question_answer What is the area of the shaded figure if the area of a grid square is 2 cm2?

    A)  36 \[\text{c}{{\text{m}}^{\text{2}}}\]       

    B)    32 \[\text{c}{{\text{m}}^{\text{2}}}\]       

    C)  18 \[\text{c}{{\text{m}}^{\text{2}}}\]       

    D)  30 \[\text{c}{{\text{m}}^{\text{2}}}\]

    Correct Answer: D

    Solution :

    From the given figure, the number of squares shaded = No. of full squares + \[\frac{\text{no}\text{.of squares}}{2}+\]no. of half squares \[=10+\frac{2\times 4}{2}+2\times \frac{1}{2}=15\] Area of each grid square \[=\text{ 2 c}{{\text{m}}^{\text{2}}}\] \[\therefore \] The area of shaded figure \[=\text{15 }\times \text{ 2 c}{{\text{m}}^{\text{2}}}\text{ }=\text{3}0\text{ c}{{\text{m}}^{\text{2}}}\]

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