Question

find the lateral surface area and total surface area of the cuboid whose height ,length and breadh are25cm, 20cm, 15cm

Answer 1

Answer:

lateral surface area of cuboid is 2(l+b)h

2(25+20)15

2×45×15

1350 cm answer

total surface area of cuboid is lb+bh+lh

25×20+20×15+25×15

1174 cm answer

I hope it may help you

Answer 2

Given :-

• Length of Cuboid = 20cm
• Breadth of Cuboid = 15cm
• Height of Cuboid = 25cm

To Find :-

• The Lateral Surface Area of Cuboid
• The Total Surface Area of Cuboid

Solution :-

❍ As we know that, Lateral Surface Area of a Cuboid and Total Surface Area of a Cuboid are given by [ L.S.A = 2(l + b)h ] [ T.S.A of cuboid = 2(lb + bh + lh) ] respectively where l , b and h stands for Length , Breadth and Height respectively.

Lateral Surface Area :

⟾⠀⠀L.S.A of Cuboid = 2 (l + b) × h

⟾⠀⠀L.S.A of Cuboid = 2 ( 20 + 15 ) × 25

⟾⠀⠀L.S.A of Cuboid = 2 × 35 × 25

⟾⠀⠀L.S.A of Cuboid = 70 × 25

⟾⠀⠀L.S.A of Cuboid = 1750cm²

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➞ T.S.A of Cuboid = 2(lb + bh + lh)

➞ T.S.A = 2(20 × 15 + 15 × 25 + 20 × 25)

➞ T.S.A = 2( 300 + 375 + 500 )

➞ T.S.A = 2( 800 + 375 )

➞ T.S.A = 2 × 1175

➞ T.S.A of Cuboid = 2350cm²

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Therefore :-

• L.S.A of Cuboid = 1750cm²
• T.S.A of Cuboid = 2350cm²

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