Question

the radius of a circle whose area is 81 pie​

Answer 1

Step-by-step explanation:

radius of the circle is 9 cm

apply the formula for area of circle cut the pie on the both sides then u will get 81 ka square root which is 9

Answer 2

Answer:

area = 81 pie

pie (r)² = 81 pie

pie cancels pie

now; (r)² = 81

R = 9 . answer