What is the length of the bar needed to represent 75 kilometers( in centimeters)?
In a bar graph, 1 centimeter represents 30 kilometers. What is the length of the bar needed to represent 75 kilometers( in centimeters)?
Answer & Explanation
1 cm represents 30 km, so 2 cm reprsents 60 km, and 3 cm represents 90 km; clearly the answer is between 2 cm and 3 cm.
How many 30 km segments can you fit into a 75 km stretch of road? (The answer won’t be a whole number.)
That’s the number of 1 cm segments that you’ll need to represent that stretch of road on the map.
For these sorts of questions, ratios are useful. The centimeter to kilometer ratio is 1:30. You want x:75.
Can you go on from here?
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