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The outer edge of a circullor running track is 330 m longHe is voltes widened by 10 m around, find the cost wisdeməit at us. 8 per square meter |
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Answer» Step-by-step explanation: Answer Perimeter of track =2πr 2πr=440m u= 44 440×7 =76m Radius of ROAD=70+5=75m AREA of road =πr 2
= 7 22 ×75×75 =17678.57m 2
Area of track=πr 2 = 7 22 ×70×70m 2
=220×70m 2 =15400m 2
Area of WIDENING road= Area of road − Area of track =17678.57−15400 =2278.57m 2
1m 2 costs =RS. 8/− 2278.57 costs =Rs. 8×2278.57/- =Rs. 18228.56. |
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