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A scale on a map shows that 3 centimeters represents 10 kilometers.
What number of centimeters on the map represents an actual distance of 25 kilometers?
centimeters

A scale on a map shows that 33 centimeters represents 1010 kilometers.\newlineWhat number of centimeters on the map represents an actual distance of 2525 kilometers?\newlinecentimeters

Full solution

Q. A scale on a map shows that 33 centimeters represents 1010 kilometers.\newlineWhat number of centimeters on the map represents an actual distance of 2525 kilometers?\newlinecentimeters
  1. Determine Scale Factor: We need to determine the scale factor that relates centimeters on the map to kilometers in reality. The scale given is 33 centimeters for 1010 kilometers. To find the scale factor, we divide the number of kilometers by the number of centimeters. Scale factor = 10 kilometers3 centimeters\frac{10 \text{ kilometers}}{3 \text{ centimeters}}.
  2. Find Centimeters for 2525 Kilometers: Now we need to use the scale factor to find out how many centimeters represent 2525 kilometers.\newlineWe set up a proportion where the number of centimeters (which we are trying to find) is to 2525 kilometers as 33 centimeters is to 1010 kilometers.\newlineLet xx be the number of centimeters that represent 2525 kilometers.\newlineSo, x25 kilometers=3 centimeters10 kilometers\frac{x}{25 \text{ kilometers}} = \frac{3 \text{ centimeters}}{10 \text{ kilometers}}.
  3. Set Up Proportion: To solve for xx, we cross-multiply and get: 1010 kilometers x=3* x = 3 centimeters 25* 25 kilometers.
  4. Cross-Multiply to Solve: Now we solve for xx:x=(3centimeters×25kilometers)/10kilometersx = (3 \, \text{centimeters} \times 25 \, \text{kilometers}) / 10 \, \text{kilometers}.
  5. Perform Calculation: We perform the calculation: x=(75centimeters)/10x = (75 \, \text{centimeters}) / 10. x=7.5centimetersx = 7.5 \, \text{centimeters}.

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