Question

a part 1 metre wide is built inside a square Park of side 30 M along its side find the area of the path calculate the cost of constructing the path @ rupees 75 per metre ​

Answer 1

Answer:

   sɪᴅᴇ ᴏғ sϙᴜᴀʀᴇ ᴘᴀʀᴋ (A) = 30ᴍ

   ᴡɪᴅᴛʜ ᴏғ ᴘᴀᴛʜ  = 1ᴍ

   sɪᴅᴇ ᴏғ ɪɴɴᴇʀ ᴘᴀʀᴋ (ᴀ) = 30-1-1 = 28ᴍ

   ᴄᴏsᴛ ᴏғ ᴄᴏɴsᴛʀᴜᴄᴛɪᴏɴ = 70 ᴘᴇʀ ᴍ^2

  

   Aʀᴇᴀ ᴏғ ᴘᴀᴛʜ = Aʀᴇᴀ ᴏғ sϙᴜᴀʀᴇ ᴘᴀʀᴋ - ᴀʀᴇᴀ ᴏғ ᴘᴀʀᴋ ɪɴsɪᴅᴇ ᴛʜᴇ ᴘᴀᴛʜ 

                        = A^2  -  ᴀ^2

                        = 30^2 - 28^2

                        = 900 - 784

                        = 116ᴍ^2

  Cᴏsᴛ ᴏғ ᴄᴏɴsᴛʀᴜᴄᴛɪᴏɴ ᴏғ ᴘᴀᴛʜ  = 70×116

                                                =8120