Question

A car travel from stop a to b with a speef of 30 km h and then return back to a with a speed of 50 km h fi nd

Answer 1

with a speed of 30km/hr and then returns back to a with a speed of 50km/hr. 
Find the distance traveled by the car.
:
We have to know how long it took for the round trip to find the distance
:
Lets assume it took 12 hrs for the round trip
:
let d = the one way distance
:
Write a time equation; time = dist/speed
 +  = 12
multiply by 150
150* + 150* = 150(12)
Cancel the denominators and you have:
5d + 3d = 1800
8d = 1800
d = 1800/8
d = 225 mi one way or a total of 450 mi round trip
:
:
Confirm this find the actual time each way
225/30 = 7.5 hrs
225/50 = 4.5 hrs
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total hr: 12