What is the volume and surface area of a rectangular block?

Answer 1

The volume of a cuboid (a six sided 3D shape) is how much 'space' or 'room' it takes up. For a regular cuboid (where opposite sides are the same size) it is calculated by multiplying the length by the width by the depth. For example, A block measuring 3cm by 2cm by 5 cm would have the volume 3x2x5= 30cm3.

The surface area is the total external area of the shape. It is calculated by multiplying the height and width (surface area ) of each face and adding them together. For example a block measuring 3cm by 2cm by 5cm would have a surface area of

S A of face one= 3x2=6cm2

S A of face two=3x2=6cm2 (opposite end to face one)

S A of Face three=2x5=10cm2

S A of face four=2x5=10cm2 (opposite end to face three)

S A of face five=3x5=15cm2

S A of face six=3x5=15cm2(opposite end to face five)

total surface area = 6+6+10+10+15+15= 62cm2