Respuesta :

GloomKC

Answer:

Step-by-step explanation:

3.142*42^2=

5542.488

42/2

21

3.142*21^2

1385.622

5542.488 - 1385.622

4157.066

waltergesimba9

Step-by-step explanation:

take the area of the big circle which goes by the formula πR² which is 22/7×42×42 =5544cm²

take the radius of the big circle as the diameter of the big circle .divide it by 2 to get 21

then take the small circle by πr² which is 22/7× 21×21 = 1386cm²

. substract 5544-1386 to get 4158cm²

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