Question

if the dimension of a cuboid are 3 cm ,4cm and 10cm then its surface area is

Answer 1

ɢɪᴠᴇɴ :-

• Length of cuboid (l) = 3 cm
• Breadth of cuboid (b) = 4cm
• Height of cuboid (h) = 10 cm

ᴛᴏ ꜰɪɴᴅ :-

• Total surface area of cuboid

ꜱᴏʟᴜᴛɪᴏɴ :-

✪ As we know that ✪

➪ Total surface area of cuboid

➪ 2(lb + bh + lh)

➪ 2(3*4 + 4*10 + 3*10)

➪ 2(12 + 40 + 30)

➪ 2 × 82

➪ 164 cm²

Hence,

• Total surface area of cuboid is 164 cm²

Extra Information :-

• Volume of cylinder = πr²h
• T.S.A of cylinder = 2πrh + 2πr²
• Volume of cone = ⅓ πr²h
• C.S.A of cone = πrl
• T.S.A of cone = πrl + πr²
• Volume of cuboid = l × b × h
• C.S.A of cuboid = 2(l + b)h
• T.S.A of cuboid = 2(lb + bh + lh)
• C.S.A of cube = 4a²
• T.S.A of cube = 6a²
• Volume of cube = a³
• Volume of sphere = 4/3πr³
• Surface area of sphere = 4πr²
• Volume of hemisphere = ⅔ πr³
• C.S.A of hemisphere = 2πr²
• T.S.A of hemisphere = 3πr²

Answer 2

✴ Given :-

• Length = 3cm.

• Breadth = 4cm.

• Height = 10cm.

✴ To Find :-

• Surface Area Of Cuboid.

✴ Solution :-

We know that,

S.A. Of Cuboid = 2(lb + bh + hl).

Put the values.

⇢ 2(3 × 4 + 4 × 10 + 3 × 10).

⇢ 2(12 + 40 + 30).

⇢ 2(82).

⇢ 2 × 82.

⇢ 164cm²

Hence, The Surface Area = 164cm².