Question

The ratio of circumferences of two circles is 3: 5. Find the ratio of their diameter​

Answer 1

Answer:

6:10

Step-by-step explanation:

$2\pi \: r \: = \: circumference \\ 2\pi \: r_{1 \div \: 2\pi r_{2} } = 3 \div 5 \\ r _{1} \: \div r_{2} \: = 3 \div 5 \\ (multiplying \: 2 \: both \: sides) \\ 2 r_{1} \div 2 r_{2} = 6 \div 10 \\ ratio \: of \: diameter \: is \: 6 \div 10$