A circular park of radius 12cm has a road of 4cm width all round it's outside.find are of the road
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Answer:
Area of road = 754.29 cm²
Step-by-step explanation:
r = 12 cm
Area of park = πr²
Area = π*4*4
Area of circular park = 16π cm²
Radius of bigger circle( Park + Road ) = 4 + 12 = 16 cm
Area of bigger circle = πr²
Area = π*16*16
Area = 256π cm²
Area of road = Area of bigger circle - Area of circular park
Area = 256π - 16π
Area = 240π cm²
Area = 240 * 22/7
Area of road = 754.29 cm²
Answered by
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Answer:
352cm^2
Step-by-step explanation:
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