Suppose the two photographs, shown in Fig. 13.1 and Fig. 13.2, 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 blue car.



Distance travelled by the blue car = 2 cm


And 1cm = 100 m (as given in the question)


2 cm = 200 m


Therefore, distance travelled by blue car = 200 m


Time taken = 10 sec


Speed of the blue car = distance/ time taken = 200/10s


Speed of the blue car = 20m/s


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