Question

convert the speed of train to km/h its speed is 25 m/s also find the distance travelled by the train in 20 minutes​

Answer 1

Answer:

distance travell =30km

Step-by-step explanation:

we know that distance =speed *time

speed=25m/s=90km/h

time =20min=20/60hour

distance travell =90*20/60

=30km

Answer 2

Answer:

• Speed of train in km/h is 90 km/h.
• Distance covered by the train in 20 minutes is 30 km.

Step-by-step explanation:

Given that:

• Speed of a train is 20 m/s.

To Find:

• Speed of the train in km/h.
• Distance travelled by the train in 20 minutes

Solution:

Finding speed of the train in km/h:

As we know that,

• To convert speed in km/h from  m/s, we have to multiply it by 18/5.

As it is given,

Speed of the train in m/s = 25 m/s

So substituting the values,

$\sf{Speed\;in\;km/h=\bigg(\dfrac{25}{1}\times\dfrac{18}{5}\bigg)km/h}$

Reducing the numbers,

$\sf{\longrightarrow\bigg(\dfrac{5}{1}\times\dfrac{18}{1}\bigg)km/h}$

$\sf{\longrightarrow (5\times18)km/h }$

Multiplying the numbers,

$\sf{\longrightarrow 90\; km/h}$

Hence, the speed of the train in km/h is 90 km/h.

Calculating distance covered by the train in 20 minutes:

As we know that,

$\sf{20\;minutes=\dfrac{20}{60}=\dfrac{1}{3}\;hours}$

And we also know that,

$\sf{Distance \;travelled = Speed \times Time \;taken}$

Substituting the values,

$\sf{Distance \;travelled = 90 \times \dfrac{1}{3}}$

Reducing the numbers,

$\sf{\longrightarrow 30\times1}$

$\sf{\longrightarrow 30}$

Hence, distance travelled by the train in 20 minutes is 30 km.