Question

a circular hole of diameter 4 cm is cut off a rectangular plate of dimensions 10 cm by 8 cm find the area of the blood after the earth has been cut out

Answer 1

$area \: of \: remaining = area \: of \: rectangle - area \: of \: circle \\ area \: of \: remaining = (10 \times 8) - \pi {4}^{2} = 80 - 50.26 = 29.74$