Answer:
The answer is 1:2
Step-by-step explanation:
For small circle
r = 4
2πr = 2 × 3.14 × 4 = 25.12
For big circle
r = 8
2πr = 2 × 3.14 × 8 = 50.24
Now,
if we divide both answers we get,
25.12 ÷ 50.24 = 1/2 = 1:2
138+89 because two negatives make a positive.
Answer:
18km
Step-by-step explanation:
1cm:4.5km/4cm then get the answer as 18km