Question

please answer with the procedure properly​ only (i)

Answer 1

Answer:

Area of the shaded region = area of rectangle - area of circle ×2

Area of the rectangle= l× b

= 28 × 14

= 392 m2

Area of circle = 22/ 7 × 7 ×7

.= 22×7

=154 m2

Area of circle ×2 .= 154 ×2 =308

Area of the shaded region =

392 - 308=84

Explanation:

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Answer 2

Answer:

Question 1 :

Area of shaded region = Area of Rectangle - Area of circles

★ Area of rectangle =

• Length = 28 cm
• Breadth = 14 cm

⇒ Length × Breadth

⇒ 28 × 14

⇒ 392 cm²

★ Area of circle =

• Diameter = 14
• Radius = 7

⇒ πr²

⇒ 22/7 × 7 × 7

⇒ 22 × 7

⇒ 154 cm²

There is one full circle and 2 semicircles. So, there are 2 total circles.

⇒ 154 × 2

⇒ 308 cm²

★ Area of shaded part =

⇒ 392 - 308

⇒ 84 cm²

Therefore, the area of the shaded part is 84 cm².

$\rule{300}{1.5}$

Question 2 :

Area of shaded area = Area of bigger rectangle - Area of smaller rectangle

★ Area of smaller rectangle -

• Length = 50 m
• Breadth = 25 m

⇒ Length × Breath

⇒ 50 × 25

⇒ 1250 m²

★ Area of bigger rectangle -

• Length = (50 + 5) = 55 m
• Breadth = (25 + 5) = 30 m

⇒ Length × Breadth

⇒ 55 × 30

⇒ 1650 m²

★ Area of shaded area -

⇒ 1650 - 1250

⇒ 400 m²

Therefore, the area of the shaded part is 400 m².