Question

in a circular garden of diameter 150m,A pond is constructed in the form of a circle with radius 20m.find the area of land left out

Answer 1

the area of the land left out is 16406. 5 sqm

Answer 2

given that according to the sum π(R²-r²) from that R =75 , R = 20 = π(R²-r²) = π(75²-20²) = 22/7(5625-400) = 22/7(5255) = 1159950/7 = 165707.14857.