Question

1. A cuboid has the dimensions 40 cm x 35 cm x
15 cm. Find (i) its surface area (ii) its volume.​

Answer 1

Given -

• Length of Cuboid = 40cm

• Breadth of cuboid = 35cm

• Height of cuboid = 15cm

To find -

• It's Surface area.

• It's volume

Solution -

Surface area of cuboid = 2lb + bh +hl

Where,

L = Length

B = Breadth

H = Height

On substituting the values -

Surface area of cuboid = 2lb + bh + hl

→ Surface area = 2 (40 × 35) + (35 × 15) + (15 × 40)

→ Surface area = 2 (1400) + (525) + (600)

→ Surface area = 2 × 2525

→ Surface area = 5050 cm³

Volume of cuboid = L × B × H

Where,

L = Length

B = Breadth

H = Height

On substituting the values -

Volume of cuboid = L × B × H

→ Volume of cuboid = 40 × 35 × 15 cm

→ Volume of cuboid = 21,000 cm³

$\therefore$ The surface area of cuboid is 5050cm³ and volume of cuboid is 21,000cm³

___________________________________________________________

Answer 2

Answer:

Given :-

• A cuboid has the dimensions 40 cm × 35 cm × 15 cm .

To find :-

1. Surface area.
2. Volume.

Solution:-

Given :-

• Length = 40 cm
• Breadth = 35 cm
• Height = 15 cm

We know that,

Solution:-

✮ Surface area of cuboid = 2(lb + bh+ hl)

↬ Surface area = 2( 40×35 + 35×15 + 15×40)

↬ Surface area = 2( 1400 + 525 + 600)

↬ Surface area = 2(2525)

↬ Surface area = 5050 cm³

Now, we have to find out the value of volume of cuboid,

✮ Volume of cuboid = L× B × H

↬ Volume = 40 × 35 × 15

↬ Volume = 21000 cm³

Hence, the surface area of cuboid is 5050 cm³ and volume of cuboid is 21000 cm³ .