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Suppose the two photographs, shown in the below figures, had been taken at an interval of \(10\ seconds\). If a distance of \(100\ metres\) is shown by \(1\ cm\) in these photographs, calculate the speed of the fastest car.
 
YCIND_220706_4007_Figure_13.1.png
Cars moving in a road
 
YCIND_220706_4007_Figure_13.2.png
Position of cars in the road after \(10\) seconds
 
From the given images, it is clear that the distance covered by the  car from one horizontal white strip to another is measured using a scale. Suppose, the scale reading is \(2\ cm\) then, it is equivalent to .
 
The formula for the speed is given as
 
On substituting the given values in the formula, we get the speed as .