Question

a train travelling at a uniform speed for 6900 km would have taken 9 hours less to travel the same distance if its speed were 15 kilometre per hour more find the original speed of the train​

Answer 1

Answer:

train travelled a distance is 6900km with a time of x hour

if a train taken 9 hour less mean x-9 hours

speed of train= 6900/x-9=15km

6900=(x-9)15

6900=15x-135

6900+135=15x

7035=15x

x=7035/15

x=469 hours

9 hour less means 460hour

original speed of a train 6900/469 = 14.7 km /hour

Answer 2

Explanation:

Thus is the right explanation