the edges of a triangular board of 6cm,8cm,and 10 cm. The cost of painting it at rate of a pair per cm square
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ᴛʜᴇ ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ᴛʜᴇ ᴛʀɪᴀɴɢʟᴇ
= s+s+s
= 6+8+10
= 24 ᴄᴍ
ᴄᴏsᴛ ᴏғ ᴘᴀɪɴᴛɪɴɢ = 1 ᴘᴇʀ ᴄᴍ²
sᴏ, 24×1
= 24 ʀs
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