Example 11. A train moving with
uniform speed for a certain distance takes
6 hours less if its speed be increased by
6 km/hour. It would have taken 6 hours more,
had its speed been decreased by 4 km/hr. Find
the distance travelled of the journey and the
speed of the train.
[CBSE 2012]
Answers
Answered by
4
From formula
D=st
given
D=(s+6)(t-4)=st-4s+6t-24.......>1
D=(s-6)(t+6)=st+6s-6t-36)......>2
from 1&2
-4s+6t=24
6s-6t=36 .....>3
on solving
2s=60 ==> s=30 km/h
(3)==> 6(30)-6t=36
t= 24 h
.
. . D=30(24) = 720 km
Ans: D= 720 km
Read more on Brainly.in - https://brainly.in/question/5403248#readmore
Similar questions