Question

17.Find the volume of wood used to make a closed box of outer dimensions 60cm x 45cm x 32em,

the thickness of wood being 2.5cm all around.​

Answer 1

Answer :

• Volume of wood is 86400 cm³

Given :

• Length = 60cm
• Breadth = 45cm
• Height = 32cm
• Thickness of wood being 2.5 all around

To find :

• Volume of wood

Solution :

As we know that,

• Volume of cuboid = lbh

Where,

• l is length
• b is breadth
• h is height

》Volume of cuboid = length × breadth × height

》60 × 45 × 32

》86400cm³

Hence , Volume of wood is 86400 cm³

Now,

Given, the thickness of wood being 2.5 all around then,

》86400 × 2.5

》216000cm

Answer 2

•ɢɪᴠᴇɴ-

• ʟᴇɴɢᴛʜ = 60 ᴄᴍ

• ʙʀᴇᴀᴛʜ = 45 ᴄᴍ

• ʜᴇɪɢʜᴛ = 32 ᴄᴍ

• ᴛʜɪᴄᴋɴᴇꜱꜱ ᴏꜰ ᴡᴏᴏᴅ ʙᴇɪɴɢ ᴀʟʟ ʀᴏᴜɴᴅ = 2.5 ᴄᴍ

•ᴛᴏ ꜰɪɴᴅ-

• ᴠᴏʟᴜᴍᴇ ᴏꜰ ᴛʜᴇ ᴡᴏᴏᴅ

•ꜱᴏʟᴜᴛɪᴏɴ-

~ᴡᴇ ᴋɴᴏᴡ ᴛʜᴀᴛ

ᴠ = ʟ × ʙ × ʜ

~ᴡʜᴇʀᴇ

ᴠ = ᴠᴏʟᴜᴍᴇ

ʟ = ʟᴇɴɢᴛʜ

ʙ = ʙʀᴇᴀᴅᴛʜ

ʜ = ʜᴇɪɢʜᴛ

★ꜰɪɴᴅɪɴɢ ᴛʜᴇ ᴠᴏʟᴜᴍᴇ★

ᴠ = ʟ × ʙ × ʜ

ᴠ = 60 × 45 × 32 ᴄᴍ

ᴠ = 86400 ᴄᴍ³

ʜᴇɴᴄᴇ,

ᴠᴏʟᴜᴍᴇ ᴏꜰ ᴡᴏᴏᴅ ɪꜱ 86400 ᴄᴍ³

ɪᴛ'ꜱ ɢɪᴠᴇɴ ᴛʜᴀᴛ, ᴛʜᴇ ᴛʜɪᴄᴋɴᴇꜱꜱ ᴏꜰ ᴡᴏᴏᴅ ʙᴇɪɴɢ 2.5 ᴄᴍ ᴀʟʟ ʀᴏᴜɴᴅ

➜ 86400 × 2.5

➜216000 ᴄᴍ

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