How long is a train which passes a signal in twenty seconds at a speed of 108 km/h

The length of the train is

Step-by-step explanation:

we know that

The speed is equal to the ratio of the distance by the time

Let

d -------> the distance in meters

t ------> the time in seconds

s -----> the speed in m/sec

Remember that

1 km=1,000 m

1 h=3,600 sec

we have

Convert to m/sec

Find the length of the train

we have

substitute in the formula and solve for d

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

25.3

step-by-step explanation:

1st step

add 3+6

=9

multipy 9*3

=37