Aman hiked a distance of 9 miles into the country. he rode back in a car along the same route at the rate of 27 mph. if the entire trip took 3 hours and 20 min, find his rate while walking

Recall your d = rt, distance = rate * time.

going into the country, he went for 9 miles, coming back it was the same 9 miles.

let's say hiking his speed is "r" mph, and he took "t" hours hiking.

now, 3 hours and 20 minutes is just 3 hours and one third, or 3 and 1/3 hour.

if he took "t" hours hiking, driving in the car, it took the slack from 3 and 1/3 and "t", or 3 1/3 - t.

Set square i think so

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