From a circular sheet of paper with a radius 20 cm, four circles of radius 5 cm each are cut out. what is the ratio of the uncut to the cut portion?
a. 1 : 3
b. 4 : 1
c. 3 : 1
d. 4 : 3
Answers
Answered by
6
so as 4 circles are cut
area = 4*(22/7 * 5^2) {22/7 is the value of pie}
= 100*22/7
as 4 r cut
4*100*22/7
=400*22/7
area uncut= 300*22/7
so the correct option is c) 3:1 ratio
area = 4*(22/7 * 5^2) {22/7 is the value of pie}
= 100*22/7
as 4 r cut
4*100*22/7
=400*22/7
area uncut= 300*22/7
so the correct option is c) 3:1 ratio
Similar questions