Question

from a rectangular cardboard 145cm long and 32cm wide 42 circular plates each of diameter 8 have been cut find the area of remaining portion ​

Answer 1

Answer:

Area of rectangle = l × b

= 145× 32

= 4640cm sq.

Area of circle =

$\pi {r}^{2}$

=22/7×4×4×42

=2112cmsq.

Area of remaining part = area of rectangle - area of 8 circles

=4640 - 2112

=2528cmsq

Therefore, Area of remaining part is 2528cmsq.