Question

A circular lawn is uniformly 7 meter wide and its inner edge is 440maters . calculate the radius of the inner circle and the area of the lawn?

Answer 1

The inner edge is 440 metres, hence the circle has a circumference of 440 m
Thence 2 x 22/7 R = 440 metres
R = (440/44) x 7 = 70 metres
The area of the lawn = 22/7 x ((77)^2 - (70)^2)
= 22/7 (5929 - 4900)
= 22/7 x 1029
= 3234 sq m



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Answer 2

Answer:

3234m^2

Step-by-step explanation:

circumference of the circle=440m

=2πr

r=440/2×22/7

r=10×7

r=70

the area of the lawn. =22/7(77)^2-(70)^2

=22/7×(5929-4900)

=22/7×1029

=3234m^2