The radius of a circular field is 56 m. The field is surrounded by a road 7 m wide. Find the area of the road.
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Step-by-step explanation:
The radius of a circular ground is 56 m. Inside it, runs a road of width 7 m all along its boundary. Find the area of this road.
Answer
Radius of circular ground=56m
Width of road inside=7m
Radius of inner circle=56−7=49m
Hence area of road= Area of outer − Area of inner
=π(56)
2
−π(49)
2
=π(3136−2401)=
7
22
×735
=2310m
2
.
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