A circular carpet of diameter 2.8 m is spotted in the centre with a 20 cm striped border. Find the area of the striped portion of the carpet to the nearest sq.cm.
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Area of stripped portion = ( Area of carpet - Area of inner portion)
Diameter of carpet = 2.8m = 280cm
So radius of carpet= 140cm
Area of carpet= 22/7(140*140) = 61600 cm sq
Radius of inner portion = 140-20=120cm
Area of inner portion= 22/7 (120*120)
= 45216 cm sq.
Area of stripped portion = 61600-45216= 16384 cm sq.
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