Asked by mike

priya decides to go to the store which is 8km from her house. she first ran at a rate of 7km/h then walked the rest of the trip at a speed of 3km/h. if the total trip took 2hrs how many kilometers did she walk?
Answered by Steve
If she walked x km, then since time = distance/speed,

x/3 + (8-x)/7 = 2