Question

If a cuboidal box has height, length and width as 20 cm, 15 cm and 10 cm respectively, then its total surface area is -------- .​

Answer 1

Answer :

• Total surface area of cuboid is 1300cm²

Given :

• length is 20cm
• breadth is 15cm
• height is 10cm

To find :

• Total surface area

Solution:

Given that , length breadth and height is 20cm , 15cm ,and 10cm of cuboid then we have to find the total surface area of cuboid

As we know that :

• Total surface area of a cuboid is 2(lb + bh + hl)

where l is length 20cm , b is breadth 15cm and h is height 10 cm

Then,

⇢ 2 (20 × 15 + 15 × 10 + 10 × 20)

⇢ 2(300 + 150 + 200)

⇢2(650)

⇢ 1300cm²

Hence Total surface area of cuboid is 1300cm²

More Explanation :

• volume of cylinder = πr²h
• surface area of cylinder = 2πr(h + r)

Answer 2

If a cuboidal box has height, length and width as 20 cm, 15 cm and 10 cm respectively, then its total surface area is __________.

By applying

TSA of cuboid formula

that is

= 2( l×b + b×h + l×h )

= 2( 20 × 15 + 15 × 10 + 20 × 10 )

= 2( 300 + 150 + 200 )

= 2( 650 )

= 1300 cm² ....

Answer = 1300 cm² ...