Question

from a square cardboard of side 21 CM a circle of maximum area is cut out find the area of the cardboard left left

Answer 1

Answer:

94.5sqcm

Step-by-step explanation:

area of square = side^2

                        = 21*21

                        = 441 sqcm

now the circle has diameter 21 cm

                 radius = 21 *0.5

                            = 10.5 cm

now area of circle = $\pi r^2$

                              = 22/7*10.5*10.5

                              = 346.5 sqcm

thus area of remaining figure = 441-346.5

                                                = 94.5 sqcm