Find X in a Cuboid: Volume 60 cm³ with Dimension (X+2)

Question

Look at the cuboid of the figure:

The volume of the cuboid is

60 cm³.

Work out the value of X.

333AAABBBDDDCCCEEEGGGFFFHHH5X+2

Video Solution

Solution Steps

00:00 Find X
00:03 Use the formula for calculating box volume
00:06 height times length times width
00:12 Substitute appropriate values and solve for X
00:34 Isolate X
00:47 And this is the solution to the question

Step-by-Step Solution

To solve the problem of finding X X for a cuboid with a given volume, we proceed as follows:

  • Step 1: Identify the dimensions of the cuboid: 5cm 5 \, \text{cm} , X+2cm X+2 \, \text{cm} , and 3cm 3 \, \text{cm} .
  • Step 2: Recall the volume formula for a cuboid: V=l×w×h V = l \times w \times h .
  • Step 3: Substitute the known values into the volume equation: 5×(X+2)×3=60 5 \times (X+2) \times 3 = 60 .

Now, let's solve this equation step-by-step:

First, calculate the product involving X X :
5×3×(X+2)=60 5 \times 3 \times (X + 2) = 60 .

Simplify the left side:
15×(X+2)=60 15 \times (X + 2) = 60 .

Next, distribute the 15 on the left side:
15X+30=60 15X + 30 = 60 .

To isolate X X , subtract 30 from both sides:
15X=30 15X = 30 .

Finally, divide both sides by 15 to solve for X X :
X=2 X = 2 .

Therefore, the value of X X is 2 2 .

Answer

2 2