Question

Travelling at 40km/hr,a train reaches a destination late by 10 minutes .while travelling at 50 km/hr ,it reaches the destination early by the 5minutes.find the length of the journey.

Answer 1

Answer:

Your answer is like this

Step-by-step explanation:

kab+2a²-b²=(a-b)(2a+b),

kab+2a²-b²=2a²+ab-2ab-b²,

kab=-ab,

then

k = -ab/ab,

k=-1

Hence the valuea of k = -1