Question

a wire in the shape of a rectangle of length 18cm and width 15 cm is reshaped and bent in the from of circle find radius and area of circle

Answer 1

Perimeter of rectangle = 2[ 18+15]
                                     = 66 cm
Circumference of the circle= 2πr = 66
                                            = 2r = 21
                                                r = 10.5 cm
Area of circle = πr²
                       =π×110.25
                       =346.5 cm²