Aptitude - Time and Distance - Discussion

Discussion Forum : Time and Distance - General Questions (Q.No. 4)
4.
A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. The speed of the car is:
100 kmph
110 kmph
120 kmph
130 kmph
Answer: Option
Explanation:

Let speed of the car be x kmph.

Then, speed of the train = 150 x = 3 x kmph.
100 2

75 - 75 = 125
x (3/2)x 10 x 60

75 - 50 = 5
x x 24

x = 25 x24 = 120 kmph.
5

Discussion:
342 comments Page 28 of 35.

Priyam said:   5 years ago
@Aditya Mohanty.

For converting the minute into the hour we take 12.5/60 and when we remove the decimal point it became 125/60*10.

Jay said:   5 years ago
How 3/2 come? Please explain.

Shavra yaqub shah said:   5 years ago
T1 - T2 = 12.5 minutes
speed1/distance1 - speed2/distance2 = 12.5 minutes .

@All.

This is how you form the equation and solve the problem related to the time difference (early/late than usual),or speed difference or distance difference.

Hani said:   5 years ago
@Shavra Yaqub Shah.

I'm not getting your answer method, please explain to me in detail.

Navas said:   5 years ago
I'm not getting your answer method, please explain to me in detail.

Aldrin said:   5 years ago
Also, they assumed that the car didn't stop anywhere and was continuously travelling.

XiYoZ said:   5 years ago
How (24 *25)/5 came?

Vicky045 said:   5 years ago
By Change Minute to hours 12.5*60.

Am I right, then how 12.5/60? Please explain me.

Anonymous said:   5 years ago
@VIcky045.

Actually,
To take delay time of train we need to have express time in hr(given is in min).
To convert Minute to Hour (x minutes/60).
To convert Hour to Minute (x hours*60).
So,
Converting 12.5 mins to 12.5/60 hour.
125/10*60 also correct since it only removes decimals.

Sahil Tiwari said:   5 years ago
Speed = D/T.
i.e- 75/12.5 = 60km.
The speed is 50% more;
60 is 50% of 120 = 120 kmph.
(3)


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