Area of a circle is πr^2.
The radius of the smaller circle with diameter 10 cm is 5 cm.
The radius of the larger circle with diameter 20 cm.is 10 cm.
Area of larger circle : Area of smaller circle
Area of larger circle = 100π.
Area of smaller circle = 25π.
Ratio = 100π : 25π or 100π/25π.
For 10 here is the answer and for 9 i’ll reply to my comment
Uhm disorder, condition, illness ?
I think it takes her brother 30 minutes to complete his homework.
Because 3/5 of an hour is 36/60
5/6 = 30/36
Hope this helps! :)
93 11/16 written as a decimal is 93.6875. Rounded it is approximately 93.7
I hope this helps:)
