Examples with solutions for Surface Area of a Cuboid: Data with powers and roots

Exercise #1

What is the surface area of the cuboid in the figure?

141414171717727272

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the dimensions of the cuboid.
  • Step 2: Apply the surface area formula for a cuboid.
  • Step 3: Calculate and interpret the result.

Now, let’s work through each step:

Step 1: We have the dimensions as follows:
- Length (ll) = 72
- Width (ww) = 17
- Height (hh) = 14

Step 2: Apply the surface area formula:
The total surface area AA is calculated using the formula:
A=2(lw+lh+wh) A = 2(lw + lh + wh) Substitute the given dimensions into the formula:
A=2((72×17)+(72×14)+(17×14)) A = 2((72 \times 17) + (72 \times 14) + (17 \times 14))

Step 3: Calculate each multiplication and sum them up:
- Calculate 72×17=122472 \times 17 = 1224
- Calculate 72×14=100872 \times 14 = 1008
- Calculate 17×14=23817 \times 14 = 238
Now substitute back into the equation:
A=2(1224+1008+238) A = 2(1224 + 1008 + 238) Add the products:
A=2(2470) A = 2(2470) Finally, multiply by 2:
A=4940 A = 4940

Therefore, the surface area of the cuboid is 4940square units 4940 \, \text{square units} .

Answer

4940

Exercise #2

Find the surface of the cuboid

Video Solution

Answer

108 108

Exercise #3

Express the surface area of the cuboid below in terms of a.

a

Video Solution

Answer

a2+2a a^2+2a

Exercise #4

Calculate X given that the surface area of the shape is 65.78 cm².

333555

Video Solution

Answer

3