Question

an aquarium is in the form of a cuboid whose external measure 80CM × 30cm × 40cm the base, side faces and back face are to be covered with a coloured paper find the area of the paper needed ?​

Answer 1

$\huge\bold\red{ Answer}$

$\large\bold{ 800cm^2}$

Explanation :-

We have $\begin{cases}{the \:length \:of\: Aquarium =L=80 cm} \\ {the\: Width \:of \:the\: Aquarium =B=30cm} \\{ Height\: of \:the \:Aquarium =H=40cm}\end{cases}$

$\small\bold{Area \: of\:<strong> </strong>the\: base <strong> </strong>= l×b=80×30=2400cm^2}$

$\small\bold{Area\:<strong> </strong>of\: side\: face =b×h=30×40=1200cm^2}$

$\small\bold{Area\: of\: back\: face = l×h=3200cm^2}$

Required Area=Area of base + Area of back face

+ (2× area of a side face)

=2400+3200+2×1200 = 8000

$\small\bold{8000cm ^{2} }$

#answerwithquality #bal

Answer 2

♡ᴀɴsᴡᴇʀ ♡:

ᴅɪᴍᴇɴsɪᴏɴs ᴏғ ᴀɴ ᴀϙᴜᴀʀɪᴜᴍ : ʟᴇɴɢᴛʜ ( 1 ) = 80 ᴄᴍ ,

ʙʀᴇᴀᴅᴛʜ ( ʙ ) = 30 ᴄᴍ , ʜᴇɪɢʜᴛ ( ʜ ) = 40 ᴄᴍ / * ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜᴇ ᴘʀᴏʙʟᴇᴍ ɢɪᴠᴇɴ , ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ᴘᴀᴘᴇʀ ʀᴇϙᴜɪʀᴇᴅ = ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ʙᴀsᴇ + 2xᴀʀᴇᴀ ᴏғ ᴛᴡᴏ sɪᴅᴇ ғᴀᴄᴇs + ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ʙᴀᴄᴋ sɪᴅᴇ ( ғʀᴏɴᴛ sɪᴅᴇ sʜᴏᴜʟᴅ ʙᴇ ᴠɪsɪʙʟᴇ ,

sᴏ , ɪᴛ ɪs ɴᴏᴛ ᴄᴏᴠᴇʀᴇᴅ ) = 1ʙ + 2xʙʜ + ʜ = 80x30 + 2x ( 30x40 ) + 80x40 = 2400 + 2x1200 + 3200 = 2400 + 2400 + 3200 = 7000 ᴄᴍ ? ᴛʜᴇʀᴇғᴏʀᴇ ,

ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ᴘᴀᴘᴇʀ ʀᴇϙᴜɪʀᴇᴅ = 7000 ᴄᴍ

$thank \: you \: very \: much$