On a highway, a 300-meter long row of cars is traveling at a rate of 60 km/h. When the cars pass a highway patrol station, they slow down to a rate of 40 km/h and continue on at this lower speed. How long will the row of cars be once every car has passed the highway patrol station?

Guest Feb 25, 2020

#2**+2 **

300 m = .3 km

when the first car passes and slows to 40 km/hr the last car is still travelling 60 kmhr

to get to the point wher it slows down will take .3 km / 60 km/hr = .005 hr

the FIRST car travels 40 km/hr * .005 hr during this time = .2 km

so now there is .2 km from the fron car to the back car ...or the line of cars compresses to 200 m length

ElectricPavlov Feb 25, 2020

#2**+2 **

Best Answer

300 m = .3 km

when the first car passes and slows to 40 km/hr the last car is still travelling 60 kmhr

to get to the point wher it slows down will take .3 km / 60 km/hr = .005 hr

the FIRST car travels 40 km/hr * .005 hr during this time = .2 km

so now there is .2 km from the fron car to the back car ...or the line of cars compresses to 200 m length

ElectricPavlov Feb 25, 2020