17 (a) The scale of a map is 1 cm represents 25 m - OCR - GCSE Maths - Question 18 - 2017 - Paper 1
Question 18
17 (a) The scale of a map is 1 cm represents 25 m.
(i) The length of a path is 240 m.
Work out the length, in centimetres, of the path on the map.
(ii) The scale ... show full transcript
Worked Solution & Example Answer:17 (a) The scale of a map is 1 cm represents 25 m - OCR - GCSE Maths - Question 18 - 2017 - Paper 1
Step 1
(a)(i) Work out the length, in centimetres, of the path on the map.
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Answer
To determine the length of the path on the map in centimeters, use the scale given, which states that 1 cm represents 25 m.
First, convert the actual length of the path from meters to centimeters. Since 1 m equals 100 cm, we have:
240extm=240×100=24000 cm
Next, using the scale, we can find the length on the map as follows:
Length on map (cm)=Scale factor (cm/m)Actual Length (cm)
In this case, the scale factor of 25 m corresponds to 1 cm. Therefore, we can write:
Length on map (cm)=2524000 cm=960 cm
Step 2
(a)(ii) Find the value of k.
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Answer
To express the scale 1 cm represents 25 m in the form of 1:k, we can set up the relationship: