SOLUTION: I have to be at a certain place at a certain time and find that I shall be 20 minutes too late if I walk at 3km/hr 10 minutes too early if I walk at 4km/hr. How far I have to walk?
Question 962620: I have to be at a certain place at a certain time and find that I shall be 20 minutes too late if I walk at 3km/hr 10 minutes too early if I walk at 4km/hr. How far I have to walk? Found 2 solutions by ankor@dixie-net.com, MathTherapy:Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website! I have to be at a certain place at a certain time and find that
I shall be 20 minutes too late if I walk at 3km/hr
10 minutes too early if I walk at 4km/hr.
How far I have to walk?
:
The walking time difference between the two trips; 20 min + 10 min = 30 min
30 min = hr
:
let d = the distance he has to walk
:
Write a time equation; time = dist/speed - =
multiply the equation by 12, cancel the denominators and you have
4d - 3d = 6
d = 6 km is the distance he walked Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!
I have to be at a certain place at a certain time and find that I shall be 20 minutes too late if I walk at 3km/hr 10 minutes too early if I walk at 4km/hr. How far I have to walk?
Let distance be D
Then time that it’d take to get to destination 20 minutes late =
Time that it’d take to get to destination 10 minutes early =
Therefore, ------>
4D – 4 = 3D + 2 ------ Multiplying by LCD, 12
4D – 3D = 2 + 4
D, or distance = km