Question

PLEASE SOLVE IT​ 8 question only​

Answer 1

Given:-

• An arm of a square is of 30 m.
• The area of that square is equal to a rectangle field, whose one arm is of 20 m.

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To find:-

• Another arm of the rectangular field.

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Solution:-

Let,

• the missing arm of the rectangular field be x.

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Firstly,

• we have to find out the area of the rectangular field.

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☆Area of rectangular field = l × b

⇛ 20 × x

⇛ 20x

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☆Area of the square field = 30 m²

⇛ 30 × 30

⇛ 900 m

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☆Area of the square field = Area of the rectangular field

⇛ 900 = 20x

⇛ 900/20 = x

⇛ x = 45 m

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Hence,

• the another arm of the rectangular field is 45 m.

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★More Formulas

• Area of rectangle = length × breadth sq.units

• Perimeter of square = 4 × side units

• Area of square = side × side sq.units

• Perimeter of circle = 2πr units

• Area of circle = πr² sq.units

• Perimeter of parallelogram = 2 × (a + b) units

• Area of parallelogram = base × height sq.units

• Perimeter of rhombus = 4 × side units

• Area of rhombus = 1/2 × diagonal (1) × diagonal (2) sq.units

• Perimeter of equilateral triangle = 3 × side units

• Area of equilateral triangle = √3/4 × a² = 1/2 × side × height sq.units

• Perimeter of trapezoid = (Sum of all sides) units

• Area of trapezoid = 1/2 × height × (sum of parallel sides) sq.units