To travel 708 km, an express train takes 6 hours more than rajdhani train. if however, the speed of the express train is doubled, it takes 3 hours less than rajdhani train. what is the speed of rajdhani train?
Answers
Answered by
2
travelled distance of an express = 708 km
time to travel = 6 hours
Doubled speed of express train = 2×6 = 12 hours.
x = time taken by rajdhani train depending the speed y = time taken by express train depending on the speed.
by 1st condition = x+6= y
then,. x-y = 6
by 2nd condition = x+6= y-3
2x-y=9
3x=15
x=15/3. x=5.
adding in eqn 1 = x-y=6
5-y=6
y=6+5
y=11 hours.
speed = distance / time
= 708/5
Speed of Rajdhani train = 141.6 km/s
time to travel = 6 hours
Doubled speed of express train = 2×6 = 12 hours.
x = time taken by rajdhani train depending the speed y = time taken by express train depending on the speed.
by 1st condition = x+6= y
then,. x-y = 6
by 2nd condition = x+6= y-3
2x-y=9
3x=15
x=15/3. x=5.
adding in eqn 1 = x-y=6
5-y=6
y=6+5
y=11 hours.
speed = distance / time
= 708/5
Speed of Rajdhani train = 141.6 km/s
Similar questions