Question

a slate is 35 cm long and 20 cm It is surrounded by a wooden frame of 2.5 CM all around find the area of the wooden frame​

Answer 1

Answer:

The wooden frame covers 300 cm^2

Step-by-step explanation:

First, let us plot down all imp. factors :

L(rect1)=35 cm

L(rect2)=35+2.5+2.5=40 cm

B(rect1)=20 cm

B(rect2)=20+2.5+2.5=25 cm

A(rectangle)=L*B

A(rect1))=L(rect1)*B(rect1)=35*20=700

A(rect2)=L(rect2)*B(rect2)=40*25=1000

A(Frame)=A(rect2) - A(rect1)

A(Frame)=1000-700=300 cm^2

Note : A(x)=Area of x

L(x)=Length of x

B(x)=Breadth of x

rect1 is the inner rectangle.

rect2 is the outer rectangle.

2.5 is added 2 times in rect2 as the length is added on both the sides.