Question

if length=12 and area=60sqcm .find perimeter of rectangle​

Answer 1

Given,

• length = 12 cm
• area = 60 cm sq

Area = length * breadth

60 = 12* breadth

So, breadth = 5 cm

Perimeter of rectangle = 12 + 5 cm = 17 cm

Answer 2

ɢɪᴠᴇɴ :

ʟᴇɴɢᴛʜ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ = 12 ᴄᴍ

ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ = 60 sǫ.ᴄᴍ

ᴛᴏ ғɪɴᴅ :

ᴡᴇ ʜᴀᴠᴇ ᴛᴏ ᴛʜᴇ ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ.

sᴏʟᴜᴛɪᴏɴ :

ʟᴇᴛ ᴛʜᴇ ʙʀᴇᴀᴅᴛʜ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ ʙᴇ x.

ᴀʀᴇᴀ ᴏғ ᴀ ʀᴇᴄᴛᴀɴɢʟᴇ = ʟᴇɴɢᴛʜ × ʙʀᴇᴀᴅᴛʜ

60 sǫ.ᴄᴍ = 12 ᴄᴍ × x

60 sǫ.ᴄᴍ/12 ᴄᴍ = x

==> x = 5 ᴄᴍ

Sᴏ, ᴛʜᴇ ʙʀᴇᴀᴅᴛʜ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ ɪs 5 ᴄᴍ.

ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ=2(ʟᴇɴɢᴛʜ+ʙʀᴇᴀᴅᴛʜ)

==> 2 (12 ᴄᴍ + 5 ᴄᴍ)

==> 2 (17 ᴄᴍ)

==> 34 ᴄᴍ

Tʜᴇʀᴇғᴏʀᴇ, ᴛʜᴇ ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ᴛʜᴇ ʀᴇᴄᴛᴀɴɢʟᴇ ᴡʜᴏsᴇ ʟᴇɴɢᴛʜ ɪs 12 ᴄᴍ ᴀɴᴅ ᴀʀᴇᴀ ɪs 60 sǫ.ᴄᴍ ɪs 34 ᴄᴍ.

❤︎Gᴏᴏᴅ Mᴏʀɴɪɴɢ❤︎

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