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.​

1 thought on “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.​”

1. 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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