Question

find the radius of a circle whose area is 1386 square centimetre

Answer 1

$\large \tt AHOY!! \:$

given the area of the circle = 1386cm²

the formula for the area of a circle is πr²

so we can write,

=> πr² = 1386cm²

=> 22/7 × r² = 1386cm²

=> r² = 1386/1 × 7/22

=> r² = 63 × 7

=> r² = 441

=> r = √441

=> r = 21

hence, the radius of the circle is 21cm.

$\large \tt HOPE \: THIS \: HELPS!!$

Answer 2

Step-by-step explanation:

r^2= 1386

r^= 22/7=1386

r^=22/7x1386

r^=63x7

20 is the Ans