Question

pls solve fast..........​

Answer 1

OB^2= AB^2 + OA^2 (Pythagoras theorem)

OB =10√2 cm

So, r=10√2cm

ar quadrant = 1/4 × π×r^2

=157 cm^2

ar square = side × side

=100 cm^2

ar shaded region =ar quad - ar square

(157 - 100)cm^2

=57 cm^2