Given :-
- Here, we have composite figure which is composed of 2 cuboids.
- The dimensions of larger cuboid is 12cm, 7cm, 7cm
- The dimensions of smaller cuboid is 7cm, 2cm , 2cm
To Find :-
- We have to find the total surface area of the composite figure
Let's Begin :-
Here,
The dimension of larger cuboid are
- Length = 12cm
- Breath = 7 cm
- height = 7 cm
We know that,
Lateral surface area of cuboid
Subsitute the required values,
Now,
We have to find the lateral surface area of smaller cuboid
- The dimensions of smaller cuboid are 7cm, 2cm and 2cm
Therefore,
Lateral surface area of smaller cuboid
The common base area of both the cuboids
Now,
The total surface area of the given composite figure
= SA of larger cuboid + SA of smaller cuboid - common base area
Subsitute the required values,
Hence, The surface area of composite figure is 470 cm² .