A train moves at average speed of 40kmph reaches its destination on time.what its average speed becomes 35kmph , then it reaches its destination 15 late. find the length of the journey?  Answers.
A) 70km  B) 85km  C) 38km  D) 14km  E) 1km
Difference between timings=15 mis=1/4hr   let the length of the journey be x km.   then x/35-x/40=1/4   8x-7x=70   x=70km   70kmnswer (70km)
<result>A</result>
A train moves at average speed of 40kmph reaches its destination on time.what its average speed becomes 35kmph , then it reaches its destination 15 late. find the length of the journey?