What is the speed of the train in km/h?Statem | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Let the length of the train be $L$ meters and its speed be $v$ $m/s$.From statement $II$,we know $L = y$.From statement $III$,the train crosses a

Vedclass · Accepted Answer

Question cannot be answered even with information in all three statements.

Vedclass · Answer

(D) Let the length of the train be $L$ meters and its speed be $v$ $m/s$.From statement $II$,we know $L = y$.From statement $III$,the train crosses a signal pole in $m$ seconds. The distance covered is the length of the train $(y)$. Thus,$v = y/m$ $m/s$.From statement $I$,the train crosses a platform of length $x$ in $n$ seconds. The total distance covered is $(x + y)$. Thus,$v = (x + y)/n$ $m/s$.While we can express the speed $v$ using statements $II$ and $III$ (or $I$ and $II$),the variables $x, y, n, m$ are not defined as numerical values. Without specific numerical values for these variables,the speed cannot be calculated as a specific numerical value in $km/h$. Therefore,the question cannot be answered.

What is the speed of the train in $km/h$?
Statements:
$I.$ The train crosses an $x$ meter-long platform in $n$ seconds.
$II.$ The length of the train is $y$ meters.
$III.$ The train crosses a signal pole in $m$ seconds.

Similar Questions

$A$ train $200 \, m$ long is running at a speed of $20 \, m/s$. In how much time (in $seconds$) will it cross a bridge of $400 \, m$ length?

$A$ train leaves the station $1 \, hr$ before the scheduled time. The driver decreases its speed by $4 \, km/hr$. At the next station $120 \, km$ away,the train reaches on time. Find the original speed of the train in $km/hr$.

How many seconds will a $500 \, m$ long train take to cross a man walking with a speed of $3 \, km/h$ in the direction of the moving train, if the speed of the train is $63 \, km/h$?

Two places $P$ and $Q$ are $162 \, km$ apart. $A$ train leaves $P$ for $Q$ and simultaneously another train leaves $Q$ for $P$. They meet at the end of $6 \, hours$. If the former train travels $8 \, km/h$ faster than the other,then the speed of the train from $Q$ is (in $km/h$):

Vedclass Test Series

Exam Paper Generator

Online Exam Module

What is the speed of the train in $km/h$?Statements:$I.$ The train crosses an $x$ meter-long platform in $n$ seconds.$II.$ The length of the train is $y$ meters.$III.$ The train crosses a signal pole in $m$ seconds.