the diameter of a circular park is 140m . around its outside a path having the width of 7m is constructed. if the path has to be fenched from inside and outside at the rate of rs 7 per metre find its total cost .
Answers
Step-by-step explanation:
Diameter of Circular Park = 140m
Radius of Circular Park = d/2
= 140/2
= 70m
Area of Circular Park = πr^2
= 22/7 × 70 × 70
= 15,400sq.m
Length of the Path = 7m
Length of the outer circle = 70 + 7
= 77m
Area of the outer circle = πr^2
= 22/7 × 77 × 77
= 18,634sq.m
Area of the path = Area of outer circle - Area of
Inner Circle
= 18,634 - 15,400
= 3,234sq.m
Cost of fencing 1sq.m path = $7
Cost of fencing 3,234sq.m = 3,234 × 7
= $22,638
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