Doon Express took 26 hours 37 minutes 10 second in travelling from Dehradun to Delhi during this time the train had a total stoppage of 8 hours 49 minutes 45 seconds at different stations from how much time was the train moving
adi7233:
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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
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