Question

The area of a circular plate is 38.5cm find its circumference using 22/7

Answer 1

Area is 38.5cm

Area of circle = 2 pie r ( let r be x)

38.5 = 2×22/7×x

385/10= 44/7 × x

385/10×7/44 = x

X= 6.125 is circumference

Answer 2

Answer:

The circumference of the Circular plate is 22cm.

Step-by-step explanation:

Given Data: Area of the circular plate=38.5 cm².

                     Circumference =?

Step-1: Area of the circle= πr².

                                 38.5=(22/7)×r².

                                 (38.5×7)÷22=r².

                                  269.5÷22=r².

                                   12.25=r².

                             ∴r=3.5cm

Step-2:  Circumference=2πr.

                                      =2×(22÷7)×3.5

                                      =22cm

     ∴Circumference=22cm.          

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