Question

Find the area of the space enclosed by two concentric circles of radii 25 cm and 17 cm.

Answer 1

Area between concentric circles = pi (25*25-17*17)=336pi cm sq.

Answer 2

Hey



Given that :-

Radius ( R ) = 25 cm


radius ( r ) = 17 cm



To find :-


Area enclosed by them ?


Solution :-


Now ,


Area of larger circle :-


pie * ( R ) ²


= pie * ( 25 ) ² cm ²



Area of smaller circle :-


pie * ( r ) ²


= pie * ( 17 ) ² cm²



Now ,


area enclosed by them :-



Area of larger circle - area of smaller circle



= pie * ( 25 ) ² - pie * ( 17 ) ²


= pie * [ ( 25 ) ² - ( 17 ) ² ]


= pie * ( 625 - 289 )


= pie * 336


= 22 / 7 * 336


= 22 * 48


= 1056 cm²



thanks :)