<span>If the radius of a circle is doubled in length, the circumference of the circle is <span>B. doubled.
</span>C = 2</span><span>πr - this is the equation for circle. So if you double the radius, its circumference also doubles.</span>
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Answer:
2500000000
Step-by-step explanation:
→ Multiply 1 by 25000
1 × 25000 = 25000
→ Convert into metres
2500000
→ Convert into centimetres
2500000000
 
        
                    
             
        
        
        
Answer: A. 40 
Step-by-step explanation:
 
        
                    
             
        
        
        
Similar rectangles have or form similar ratios. Hence to solve this, you have to get the ratio of the measurements:
Let N be the length of the similar rectangle
  5/7 = 15/N
5(N) = 7(15) -> cross multiply
  5N = 105
 5N/5 = 105/5 -> divide both sides of the equation by 5
    N = 21
Therefore, 21 meters in the length of the similar rectangle
To check - 
5/7 = 15/21 (cross multiply)
105 = 105