Question

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diameter of a circular Garden is 42 metres. there is 3.5 metre wide road around the garden. find the area of the road ​

Answer 1

hey here is your solution ..

ᴅɪᴀᴍᴇᴛᴇʀ ᴏғ ᴛʜᴇ ᴄɪʀᴄᴜʟᴀʀ ɢᴀʀᴅᴇɴ = ᴅ

ᴅ = 42 ᴍ

ʀᴀᴅɪᴜs ( ʀ )= ᴏʙ = ᴅ/2 = 42/2 = 21 ᴍ

ᴡɪᴅᴛʜ ᴏғ ᴛʜᴇ ᴀʀᴏᴜɴᴅ ᴛʜᴇ ɢᴀʀᴅᴇɴ (ᴡ)=3.5ᴍ

ʀᴀᴅɪᴜs ᴏғ ᴛʜᴇ ʟᴀʀɢᴇʀ ᴄɪʀᴄʟᴇ ( ʀ ) 

= ᴏᴀ

= ʀ + ᴡ

ʀ = 21 + 3.5 = 24.5 ᴍ

ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ʀᴏᴀᴅ ( ᴀ ) = π( ʀ+ʀ )( ʀ-ʀ )

ᴀ = ( 22/7 ) ( 24.5 + 21 )( 24.5 - 21 )

ᴀ = ( 22/7 ) × 45.5 × 3.5

ᴀ = 22 × 45.5 × 0.5

ᴀ = 500.5 ᴍ²

ᴛʜᴇʀᴇғᴏʀᴇ ,

ᴀʀᴇᴀ ᴏғ ᴛʜᴇ ʀᴏᴀᴅ = ᴀ = 500.5 ᴍ²

$this \: is \: your \: answer \: ......$