Question
Two trains ‘T5’ and ‘U5’ of lengths 800 metres
and 400 metres respectively are travelling towards each other. Ratio of speed of ‘T5’ to ‘U5’ is 5:3. If the trains take 60 seconds to cross each other from the time they meet, then find the average of speeds (in km/h) of trains ‘T5’ and ‘U5’.Solution
Let the speeds be 5y and 3y m/s respectively.
Relative speed = 5y + 3y = 8y m/s
ATQ,
8y × 60 = 800 + 400
⇒ 480y = 1200
⇒ y = 2.5
Therefore, required average = (5y + 3y) ÷ 2 = 4y
= 4 × 2.5 = 10 m/s = 10 × (18/5) = 36 km/h
What is the default shell in most Linux distributions?
What is an algorithm?
Accessing the data value or message value which may even cause a function invocation, is called?
Type-checking is normally done during
- Which one of the following algorithm design techniques is used in finding all pairs of shortest distances in a graph?
What is the time complexity of searching an element in a balanced binary search tree?
In the first step of the TCP three-way handshake, what does the client (initiator) do?
What is the role of a software architect in the software development process?
Which application layer protocol is primarily used for securely transferring files over a network?
Which layer of the OSI model interacts directly with the user or application software?
Relevant for Exams:
