A road 3.5 m wide surrounds a circular plot whose circumference is 44 m. Find the cost of paving the road at $20 per m^2.(take π=22/7)
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Circumference=2πr
So,
⇒44=2*22/7*r
⇒r=(44*7)/(2*22)
⇒r=308/44
⇒r=7m
Now,
area of the road surrounding the plot=πr²
=22/7*(3.5)²
=38.5m²
The amount will be=38.5*$20
=$770
Hope this will help
So,
⇒44=2*22/7*r
⇒r=(44*7)/(2*22)
⇒r=308/44
⇒r=7m
Now,
area of the road surrounding the plot=πr²
=22/7*(3.5)²
=38.5m²
The amount will be=38.5*$20
=$770
Hope this will help
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