The volume of a rectangular box is equal to its length times
width times height.
Total surface area is the sum of the areas of each of the 6
sides. Since each side will have the same area as the one opposite
it, we can find the surface area of each of the three visible
sides, double them to account for the sides we can't see, and
then add them.
Task: If a rectangular solid has a length of 6,
a width of 4, and a height of 3, what is its total surface
area? Type your answer into the text box and then click Continue.
Surface Area = 108
To find the total surface area, take the area of each of the
visible sides, double them to account for the opposite sides
which cannot be seen, and then add them.
Side one is 6 × 3, side two is 4 × 3, and side
three is 6 × 4, so doubling each side and adding gives
us a surface area of: 2(6)(3) + 2(4)(3) + 2(6)(4) = 108.
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