Question

To travel 612 km, an express train takes 9 hours more than rajdhani. if the speed of the express train is doubled, it takes 3 hours less than rajdhani. thespeed (in km/hr) of rajdhani is

Answer 1

hope this solution helps you ..

Answer 2

Answer:

Step-by-step explanation:

Let Y = speed of express and x = time taken by Rajdhani

Y(9+x) = 2Y(x-3)

By solving we will get,

X = 15 then

Speed of Rajdhani

= 612 / 15

= 40.8

This is very short and easy solution.