Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 3)
3.
If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:
Answer: Option
Explanation:
Let the actual distance travelled be x km.
| Then, | x | = | x + 20 |
| 10 | 14 |
14x = 10x + 200
4x = 200
x = 50 km.
Discussion:
174 comments Page 6 of 18.
Krishna reddy.gongati said:
1 decade ago
I am not clear with the explanation and I didn't understand this step x/10=x+20/14.
Anu said:
1 decade ago
How we get the 200 here? In this answer please help me in this case.
Selvam said:
1 decade ago
Hey anu see cross multiplication
So,
x/10=(x+20)/14
first multiply the (x+20) by 10 and u ill get 10x+200
second multiply the x by 14 so u ill get 14x
now 14x=10x+200
14x-10x=200
4x=200
x=200/4
x=50
I hope you will understand this.
So,
x/10=(x+20)/14
first multiply the (x+20) by 10 and u ill get 10x+200
second multiply the x by 14 so u ill get 14x
now 14x=10x+200
14x-10x=200
4x=200
x=200/4
x=50
I hope you will understand this.
Harpreet Kaur said:
1 decade ago
I liked the explanation given by Kinnari. I thank you for that.
Arti said:
1 decade ago
Thanks to ilesh I got it.
Lak verma said:
1 decade ago
Time not given in question so let it (X) then
Speed*time=distance
14x -10x=20
X=5 hr
So 10*5=50km question asking for distance
Speed*time=distance
14x -10x=20
X=5 hr
So 10*5=50km question asking for distance
Rahul said:
1 decade ago
The question is asked to find out the distance traveled by the person, and its clearly written he traveled 20km more so we equate it as (x+20) as the distance traveled by him and then when we get the value of X to be 50km. Why it is not added by 20km to get final answer as 70km ?
Jayaraj said:
1 decade ago
Kinnari's explanation is simple and good.
Thirumoorthy Lalapet Karur(DT) said:
1 decade ago
Note: That in both speed Time will be same so
for speed 10km/hr speed=distance/time
10 =x/time1
for speed 14km/hr 14 =(x+20)/time2
: Note time will be same so we equate these two equations respect with time
time1 = time2
time1 = x/10
time2 = (x+20)/14
(X/10)=(X+20)/14
we solve this to obation right answer
for speed 10km/hr speed=distance/time
10 =x/time1
for speed 14km/hr 14 =(x+20)/time2
: Note time will be same so we equate these two equations respect with time
time1 = time2
time1 = x/10
time2 = (x+20)/14
(X/10)=(X+20)/14
we solve this to obation right answer
Manoj said:
1 decade ago
@Ilesh method is best one.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers