Question
A train of length 420 m can cross a platform of length
‘y’ m in 30 seconds. Also, it can cross another train of same length as that of the platform, moving at a speed of 22 m/sec in opposite direction, in 15 seconds. Find the value of ‘y’.Solution
ATQ,
Let the speed of train be ‘s’ m/sec.
According to question:
(420 + y) = 30 × s -----(1)
(420 + y) = 15 × (s + 22) -----(2)
Solving (1) and (2), we get
30 × s = 15 × (s + 22)
30s – 15s = 15 × 22
15s = 330
s = 330 / 15
s = 22 m/s
Putting the value of ‘s’ in equation (1), we get
(420 + y) = 30 × 22
(420 + y) = 660
y = 660 – 420
y = 240 m
Which of the following can cause a Tsunami?
Where will the first IIT campus outside India be established to expand the reach of the Indian Institutes of Technology (IITs)?
How many biosphere reserves are there in India?
Among the following options, which country is considered an emerging market economy in Europe?
President of India is empowered to make which of the following appointments?
A. Chief of the Army
B. Speaker of the Lok Sabha
C. Ch...
With which of the following companies has ISRO collaborated with to strengthen research and development of NaviC messaging service?
How many members are nominated by the President to the Rajya Sabha?
The ages of Mr. Kumar and his son are in the ratio 5:3. Fifteen years back this ratio was 2 :1. What was the age (in years) of Mr. Kumar when his son wa...
With which financial institution did the Indian Renewable Energy Development Agency Ltd. (IREDA) sign a Memorandum of Understanding (MoU) for advancing ...
Article _______ of the Indian constitution provides for superintendence, direction and control of elections vested in an Election commission
Relevant for Exams:
