two automobiles start out at the same time, travelling in opposite directions. If the average speed of one car is 5 km/hr more than that of the other and they are 425 km apart at the end of 5 hours what is the average speed of each?
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let speed of A be x
and speed of B car be x+5
after 5 hr distance of A from B is425 km
total speed =total distance/ total time
x+x+5=425/5
2x+5=85
2x=85-5
x=80/2
x=A=40 km/hr
and B=40+5=45 km/hr
and speed of B car be x+5
after 5 hr distance of A from B is425 km
total speed =total distance/ total time
x+x+5=425/5
2x+5=85
2x=85-5
x=80/2
x=A=40 km/hr
and B=40+5=45 km/hr
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