Question

How do I calculate the total surface area of a compound shape ?

Answer 1

To find the total surface area of compound shape.

The area of one rectangle with length 18 cm and width 10 cm

`A=18*10=180sq.cm`

The area of second rectangle with length 10 cm and width 4 cm.

`A=10*4=40sq.cm`

The area of square with side 4cm

`A=4*4=16sq.cm`

For the overlapping figure.

`A=18*7-7*4=126-28=98`

Hence the total surface area of compound shape is

`180+40+16+98=334sq.cm`