A train travelled at a constant speed of 40m/s
for a distance of 180000m
calculate the time taken for
the journey

Time = distance /  speed

Time = 180,000 meters / 40 m/s

Time = 4,500 seconds

1 minute = 60 seconds:

4,500 seconds / 60 seconds/minute = 75 minutes

1 hour = 60 minutes

75 - 60 = 15

The train traveled for 1 hour and 15 minutes.

answer: 25.4 units

step-by-step explanation: radius = 12.7 units

diameter = twice the radius

diameter = 12.7 x 2

= 25.4