Question

Find the area of shaded portion if radius of circle is 7 cm, dimensions of rectangle are 40 cm by 20 cm and lengths of parallel lines of trapezium are 120 cm and 160 cm. Distance between parallel lines is 100 cm.​





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Answer 1

Answer:

= 375 cm2

Step-by-step explanation:

Area of a trapezium= 1/2 × (distance between two parallel sides) (sum of two parallel slides)

= 1/2× 15 × (30+20) cm 2

= 1/2 × 15 ×50

= 750/2 = 375 cm2

Answer 2

$\huge\pink{Answer}$

We divide the trapezium into 3 parts: 2 triangles and a rectangle.

Base of triangle

=

2

20−10

=

5

Height of the triangle and rectangle

(h)

2

=

13

2

−

5 2

⇒

(h)

2

=

144

⇒

h=

12

Area of trapezium

=

2

1

×

(sum of parallel sides) ×

(height)

=

2

1

×

(10+

20)×

(12)

=

180 sq.cm