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A man running round a racecourse notes that the sum of the distances of two flag-posts from him is always 10 m and the distance between the flagposts is 8 m. The area of the path he encloses is-
18π square metres
15π square metres
. 12π square metres
. 8π square metres
2 √b2 + 16 = 10
Or b = 3 cm x + (x + 8) = 10
x = 1 cm
∴ a = 5 cm
Area = 15π cm2
By: Yachna ProfileResourcesReport error
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