Question

the diameter of two circular rings are 7cm and 12cm. Find ratio of their circumferences​

Answer 1

Answer:

35:60

Step-by-step explanation:

if diameter two circles are 7cm and 12cm then their radius will be half the diameter i.e. 3.5cm and 6cm

now

Circumference of 1st corcle(C1)

=2×22/7 ×3.5

and,Circumference of 2nd circle(C2)

=2×22/7 ×6

now ratio of circumferences would be:C1/C2=(2×22/7 ×3.5)/(2×22/7 ×6)

=3.5/6

=35/60

since ratio of their circumference will be-35:60

Answer 2

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