551
google search
Google search results:
1: https://www.toppr.com/ask/en-jp/question/a-car-covers-the-first-half-the-distance-between-two-places-at-40-kmh-another/
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2: https://nacto.org/docs/usdg/vehicle_stopping_distance_and_time_upenn.pdf
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3: https://www.toppr.com/ask/en-es/question/a-car-travels-the-first-one-third-of-a-certain-distance-with-a-speed-of/
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4: http://www.gov.pe.ca/photos/original/tpw_dh_chap4.pdf
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5: https://www.science.org.au/curious/technology-future/physics-speeding-cars
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6: https://www.omnicalculator.com/everyday-life/speed
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7: https://en.wikipedia.org/wiki/Speed_limit
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8: http://www.uwosh.edu/coehs/cmagproject/many_word/documents/Auto_Prob1.pdf
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