Question

. A passenger train having speed of 80 km/h
runs from a station 6 hours after a goods
train has started from that station and
crossed the goods train after 4 hours. What
is the speed of goods train?
(A) 32 km/h (B) 48 km/h
(C) 60 km/h (D) 50 km/h​

Answer 1

Answer -

• Speed of passenger train - 80 km/h
• Time taken - 4 hour

Distance goods train travel in 10 hr =

$\rm :\longrightarrow distance \: = speed \times time$

$\rm :\longrightarrow distance \: = 80 \times 4$

$\rm :\Longrightarrow distance \: = \bold{320}$

Now ,

Speed of goods train =

$\rm :\longrightarrow speed \: = \dfrac{distance}{time}$

$\rm :\longrightarrow speed \: = \dfrac{320}{10}$

$\rm :\Longrightarrow speed \: = \bold{32 km/hr}$

$\begin{gathered} \underline{ \qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad} \\ \end{gathered}$

Hence , Option A is correct

Answer 2

Step-by-step explanation:

Speed of passenger train - 80 km/h

Time taken - 4 hour

Distance goods train travel in 10 hr =

\rm :\longrightarrow distance \: = speed \times time:⟶distance=speed×time

\rm :\longrightarrow distance \: = 80 \times 4:⟶distance=80×4

\rm :\Longrightarrow distance \: = \bold{320}:⟹distance=320

Now ,

Speed of goods train =

\rm :\longrightarrow speed \: = \dfrac{distance}{time}:⟶speed=

time

distance

\rm :\longrightarrow speed \: = \dfrac{320}{10}:⟶speed=

10

320

\rm :\Longrightarrow speed \: = \bold{32 km/hr}:⟹speed=32km/hr

\begin{gathered}\begin{gathered} \underline{ \qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad} \\ \end{gathered}\end{gathered}

Hence , Option A is correct