Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 13)
13.
It takes eight hours for a 600 km journey, if 120 km is done by train and the rest by car. It takes 20 minutes more, if 200 km is done by train and the rest by car. The ratio of the speed of the train to that of the cars is:
Answer: Option
Explanation:
Let the speed of the train be x km/hr and that of the car be y km/hr.
| Then, | 120 | + | 480 | = 8  |
1 | + | 4 | = | 1 | ....(i) |
| x | y | x | y | 15 |
| And, | 200 | + | 400 | = | 25 | |
1 | + | 2 | = | 1 | ....(ii) |
| x | y | 3 | x | y | 24 |
Solving (i) and (ii), we get: x = 60 and y = 80.
Ratio of speeds = 60 : 80 = 3 : 4.
Discussion:
84 comments Page 8 of 9.
Hari said:
1 decade ago
Is there any short method for this?
(1)
Malathi said:
1 decade ago
Hai sir where we get 1/15 and 1/24?
Srijan said:
1 decade ago
How it comes 25/3 please explain?
Namita said:
9 years ago
How, from where that 1/15 came?
(1)
Manthan Patel said:
4 years ago
Anyone please explain clearly.
(1)
Vids said:
2 decades ago
Hi, from wher that 25/3 came?
(2)
L.dhanaraj said:
10 years ago
Hi any one tell me short cut?
Sathish said:
9 years ago
How 120/x + 480/y = 8?
Sainath said:
6 years ago
How did we got 25/3?
Prashant said:
7 years ago
Thanks @Rahul Singh.
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