Question

10. The ratio of the circumference of two circles is 4: 1. Find the ratio of their areas. ​

Answer 1

Answer:

R/R= 4/1

area of Ist/area of IInd = R^2/r^2 = 16/1

Answer 2

correct answer is 1:2

for 1st circle radius = r¹

circumference = c²

area = a¹

for 2nd circle radius = r²

circumference =c²

area = a²

given a¹/a² => π (r¹)/ π (r²) = 1/4 => r¹/r =1/2 ••• (1)

now

c¹/c² = 2 π r¹ / 2 π r² = r¹/r² = 1/2 •••• ( by(1) )