Question

The top surface of a raised platform, as shown in the figure, is in the shape of a regular octagon of side . What is the area of the octagonal surface? ​

Answer 1

Answer:

answer is

Step-by-step explanation:

Correct option is

A

119m

2

⇒Area of Trapezium=

2

1

(Sum of parallel lines)×height

⇒Area of the octagonal surface ABCDEFGH

=Area(trap.ABCH)+Area(rect.HCDG)+Area(trap.GDEF)

=[

2

1

(5+11)×4+(11×5)+

2

1

(11+5)×4

]m

2

=(32+55+32)m

2

=119m

2

.

solution