a circular pond of of 21m in diameter. it is surrounded by 3.5m wide path. find the surface area of constructing the path at the rate of Rs.25 per metre.
Answers
Answered by
58
D=21cm inner radius(r) =21/2cm=10.5cm
Outer radius(R) = 10.5+ 3.5=14cm
Inner area= pie r^2=22/7*10.5*10.5=346.5cm^2
Outer area = pie R^2 = 22/7*14*14=616 cm^2
Area of path= 616-346.5=269. 5cm^2
Cost=269.5*25=Rs6737.5
Outer radius(R) = 10.5+ 3.5=14cm
Inner area= pie r^2=22/7*10.5*10.5=346.5cm^2
Outer area = pie R^2 = 22/7*14*14=616 cm^2
Area of path= 616-346.5=269. 5cm^2
Cost=269.5*25=Rs6737.5
Answered by
9
Answer:
6737.50
INSTRUCTION
SEE BOTH IMAGE TO GET THE ANSWER.
SIMPLE
EASY
Attachments:
Similar questions