Question

2. A train whose length is 150 m, passes a telegraph pole in 10 sec. Find the speed of the
train in km /h.​

Answer 1

$\bf{\underline{\underline{Question:-}}}$

• A train whose length is 150 m, passes a telegraph pole in 10 sec. Find the speed of the train in km /h.

$\bf{\underline{\underline{Given:-}}}$

• Length of train = Distance (S) = 150 m

• Time taken by train = Time (T) = 10 sec

$\bf{\underline{\underline{Solution:-}}}$

$\sf † Speed (v) =\dfrac{ Distance(d)}{Time(T)}$

$\sf :→ \dfrac{ 150}{10 }$

$\sf :→ 15 m/s$

$\bf{\underline{\underline{We\:Know:-}}}$,

$\bf :→ 1 m/s = \dfrac{18}{5}km/h$

$\bf{\underline{\underline{Therefore:-}}}$

$\sf :→ Speed = 15 m/s × \dfrac{18}{5}$

$\sf :→ Speed =3 ×18$

$\bf ★ Speed=54 km/h$

$\bf{\underline{\underline{Hence:-}}}$

• The speed of the train in kilometer per hour is 54 or 54km/h

Answer 2

Answer:

54km/h

Step-by-step explanation:

=>Distance = 150 m

=>Time taken = 10 sec

therefore , speed = 150/10=15 m / s

=>15×60×60/1000 km/h

=>54km/h