Question
Train B whose length is (l+40) metre can cross a pole in
20 seconds. Train A can cross 168 metre long platform in 44 seconds. The length of train A is 80 metre less than that of train B. If the speed of train A is 10 m/s less than that of train B, then find out the value of ‘l’.Solution
If the speed of train A is 10 m/s less than that of train B. Let’s assume the speed of train A is ‘y’ m/s. y = (speed of train B) - 10 speed of train B = (y+10) m/s Train B whose length is (l+40) metre can cross a pole in 20 seconds. (y+10) = (l+40)/20 20(y+10) = (l+40) 20y+200 = (l+40) 20y = (l+40)-200 20y = (l-160) y = (l-160)/20 Eq.(i) The length of train A is 80 metre less than that of train B. length of train A = (l+40)-80 = (l-40) metre Train A can cross 168 metre long platform in 44 seconds. [(l-40)+168]/44 = y Eq.(ii) Eq.(i) = Eq.(ii) (l-160)/20 = [(l-40)+168]/44 (l-160)/5 = [(l-40)+168]/11 11l-1760 = 5l-200+840 11l-1760 = 5l+640 11l-5l = 640+1760 6l = 2400 Value of ‘l’ = 400
What will be the output of the code
int main(){
int x= 10;
int y=10;
int s=-(-x-y)
cout<
return 0;
}
In a virtual memory system, what is a "page fault"?
Which type of transistor is less susceptible to thermal runaway?
What is the unit of electric current?
Which transport layer protocol provides connection-oriented, reliable, and ordered delivery of data packets between applications?
The result of SQL select statement is?
What is an ER diagram used for?
Which routing protocol is commonly used within an autonomous system (AS) to determine the best path for data packets?
Which distribution is used to model the number of successful outcomes in a fixed number of independent Bernoulli trials?
Which component in the MVC architecture communicates directly with the database?
Relevant for Exams:
