Question

A cuboid is 40 cm long, 30 cm wide and 15 cm high, then find the total surface area of the cuboid ​

Answer 1

Answer:

total surface area = 2h ( l+b ) + 2lb

= 2( 40×30 + 40×15 + 15×30 )

=2( 1200 + 600 + 450 )

= 2 ( 2250 ) = 4500 cm²

Answer 2

Answer:

Surface area of a cuboid is $4500$ $cm^{2}$.  

Step-by-step explanation:

Given : For a Cuboid, Length = $40$ cm

                       Width = $30$ cm

                       Height = $15$ cm

To find : The total surface area of a cuboid?

Solution :

• It is given that for a Cuboid, Length = $40$ cm

                       Width = $30$ cm

                       Height = $15$ cm

• We have to find the total surface area of a cuboid.
• Cuboid is a closed geometrical figure consist of six quadrilateral faces.
• The formula for surface area of a cuboid is given by,

    Surface area of a cuboid = $2lw+2lh+2hw$

                                         = $2*40*30+2*40*15+2*30*15$

                                         = $2400+1200+900$

                                         = $4500$ $cm^{2}$

• ∴ Surface area of a cuboid is $4500$ $cm^{2}$.