4. In a rectangular park of size 40 m by 20 m, there are 4 flower beds as shown in the picture.
Given that the flower beds are in the shape of a quarter of a circle of radius 5 m. The park has lush green grass in the remaining portion. Find the area under the grass cover, using appropriate mathematical strategies.
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Total area of rectangular park = 40 x 20 = 800 m²
Area of 4 flower beds = 4 x 1/4 x 22/7 x 5 x 5 = 78.6 m²
So , Area under grass cover = 800 - 78.6 = 721.4 m²
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Answer:
721.47
Step-by-step explanation:
Area of park =l×b
=20×40=800
Since all flower beds have same radius and all form a quarter of circle
therefore are of 4 flowerbeds = area of circle of same radius as flower beds
=Πr^2
= 22/7 ×5×5=78.53
area under grass cover =area of park -area of flower beds
=800-78.53=721.47
MARK AS BRAINLIST
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