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Perimeter of Square and Rectangle

Find the area...

Question

Find the area of the unshaded portion of figure, the shaded portions being semi-circular regions.

100.5 m^{2}

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101.5 m^{2}

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201.5 m^{2}

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101.8 m^{2}

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Solution

The correct option is B $101.5 m^{2}$ .
Area of unshaded portion $=$ Area of rectangle - Area of circle
$=$ $l \times b - π r^{2}$
$=$ $14$ $\times 10 - \frac{22}{7} \times 3.5 \times 3.5$
$=$ $140 - 38.5$
$=$ $101.5$ $m^{2}$

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Similar questions

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In a floral design made from tiles each of dimensions $40 c m$ by $60 c m$ (See figure), find the ratios of

a) The perimeter of the shaded portion to the perimeter of the whole design.

b) The area of the shaded portion to the area of the unshaded portion.

Question 76

In a floral design made from tiles each of dimensions 40cm by60 cm (See figure), find the ratios of

a) The perimeter of the shaded portion to the perimeter of the whole design.

b) The area of the shaded portion to the area of the unshaded portion.

In a floral design made from square tiles each of dimensions 40 cm by 40 cm (See figure), find the ratios of

a) The perimeter of the shaded portion to the perimeter of the whole design.

b) The area of the shaded portion to the area of the unshaded portion.

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