SOLUTION: for a particular car assume the range of 50 to 90km/hr fuel consumption will be directly proportional to the speed of the car. the car consumes 6lit/hr when travelling 75km/hr. on

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Question 824369: for a particular car assume the range of 50 to 90km/hr fuel consumption will be directly proportional to the speed of the car. the car consumes 6lit/hr when travelling 75km/hr. on sunday the car travelled at 6 days during the trip and 90 km/hr during return trip. if the total fuel consumption in the round trip was 20 liters.what is the distance between cities.
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
"the car consumes 6lit/hr when travelling 75km/hr."
'
Let r= speed and E = fuel consumption rate.
rk=E;
k=E%2Fr
'
Putting the given value and computing,
k=6%2F75=2%2F25

Your question description is unfortunately confusing. My attempt to help is just this:
90 km/hr means, 90%282%2F25%29=E in liters per hour.
E=7%261%2F5 liters per hour.
You say, 20 L were used for the roundtrip, so 20%2Aliters%281%2Ahour%2F%287.2%2Aliters%29%29=2.78 hours of roundtrip travel time.

I have no idea what the 6 days and the Sunday information means. You need to clean or clarify your problem description and maybe recheck what question you want to ask.