 # The formula for the surface area of ​​a block and how to calculate it Block Surface Area Formula The surface area of ​​the beam is the total area of ​​the surface or side plane of the beam. The beam has six sides, namely the top side, bottom side, right side, left side, front side and back side. If we draw the sides of the beam horizontally it will form a grid of beams. Now, the area of ​​the nets of the beams is called the surface area of ​​the beam. Material basic math formula this time I will invite you to help learn and understand the formula for calculating the surface area of ​​a space called a block. Read the material below with full concentration, yes!

### Explanation of Block Surface Area Formula

We can find the surface area of ​​the cuboid by using the formula:

Surface area of ​​the block = 2 (length x width) + 2 (length x height) + 2 (width x height)
Surface area of ​​the block = 2 pl + 2 pt + 2 lt
Surface area of ​​the block = 2 (pl + pt + lt)

Also read: Formulas for Finding the Area of ​​a Cone Blanket and Examples of Problems

Check out how to use the formula in some of the questions below:

#### Example Question 1

A block has a length of 20 cm, a width of 14 cm and a height of 10 cm. what is the surface area of ​​the block?

Solution:
is known:
p = 20
l = 14
t = 10

Block Surface Area = 2 (pl+pt+lt)
= 2 x (20×14) + (20×10) + (14 x 10)
= 2 x (280 + 200 + 140)
= 2 x 620
= 1240 cm2

then the surface area of ​​the block is 1240 cm2

#### Example Question 2

If a block has a volume of 480 cm3 with the length and width of the sides 10 cm and 8 cm, respectively. So what is the height of the block? And what is the total surface area?

Solution:
Is known:
Volume = 480 cm3
P = 10
L = 8

To find the height of the block, let’s use the formula for the volume of the block:

V . beam = pxlxt
480 cm³= 10 x 8 xt
480 cm³= 80 t
t = 480 : 80
t = 6 cm
So the height of the block is 6 cm.

after knowing the height of the block, then we can find the surface area:
Surface area of ​​the block = 2 (pl + pt + lt)
= 2 (10 x 8 + 10 x 6 + 8 x 6)
= 2 (80 + 60 + 48)
= 2 x 188
= 376 cm²
then the surface area of ​​the block is 376 cm2

#### Example questions 3

If the surface area of ​​a cuboid is 202 cm3 Find the width of the block if its length is 5 cm and its height is 2 cm.

Solution:
Surface Area = 2 (5l + (5×2) + (2l)
202 cm3 = 2 (10 + 7l)
202 cm3 = 20 + 14l
202-20 = 14l
182 = 14l
l = 182/14
l = 13cm
then the width of the block is 13cm

How? Do you understand about The formula for the surface area of ​​a block and how to calculate it. If there is something you don’t understand, please ask questions in the comments section below. Or maybe you can ask your teacher at school. Also check out my article about How to Calculate the Volume Formula for Cubes and Blocks ## Your Xiaomi Smartphone Touchscreen Error Not Working or Ghost Touch? Try the following first aid methods ## ieGeek Surveillance Camera With WIFI Outdoor Audio PIR Motion Detection Night Vision Camera Waterproof Home Security CCTV Camara ## 10 Yoga Apps That Will Help You Work Out Anywhere ## 1080P IP WIFI Camera Wireless Tuya Smart Life APP Two Ways AUDIO Security Surveillance CCTV Cameras Baby Monitor ## Complete Theme Pack Xiaomi Miui 8 Mtz Edition Re-Zero Feat Emilia, REM, RAM, Subaru: Team REM Where’s the Sound?!! ## 1080P Small Mini Camera USB Webcams HD Pen Micro Cam Pocket DVR Video Recorder Night Vision Motion Detect For Youtube Recording ## How to Solve the Error “File or Directory is Corrupted and Unreadable” in Windows ## Wireless Floodlight Camera Full Color 3MP Automatic Human Tracking Surveillance Security Camera Night Vision Wifi Monitor ## 5MP Security POE Camera IP 2.8-12mm Varifocal Manual Lens Wired Outdoor Bullet IP Camera ONVIF 30M IR 