Question

A train covers a distance of 492.75 km in 7.5 hours. What will be its average speed in m/sec?​

Answer 1

ANSWER:

v = 18.25 m/s

CONVERSIONS TO BE USED:

1 km = 1000 m

1 hr = 3600 s

GIVEN:

d = 492.75 km = 492750 m

t = 7.5 hr = 27000 s

TO FIND:

VELOCITY(v) = ?

FORMULA:

velocity = distance / time

EXPLANATION:

v = 492750/27000

v = 18.25 m/s

HENCE THE TRAIN WILL HAVE THE AVERAGE SPEED OF 18.25 m/s

NOTE : REFER ATTACHMENT FOR DETAILED CALCULATION.

Answer 2

Given information:

Distance = 492.75 km

Time = 7.5 h

To find:

The speed in m/s

Step-by-step explanation:

We can first find the speed in km/h, and then convert it in m/s. The alternative method is also mentioned.

Speed in km/h = Distance/Time = 492.75/7.5

Speed = 65.7 km/h

In m/s = 65.7 × 1000/3600

= 18.25 m/s

Alternative method:

Distance in m = 492.75 × 1000 = 492750 m

Time in s = 7.5 × 3600 = 27000 s

Speed = Distance/Time

Speed in m/s = 492750/27000

= 18.25 m/s