find the value of k for which the roots of quadratic equation kx2-10x +5=0 are equal.
find the value of p for which roots of quadratic equation 3x2 -px+3=0 are real where p>0.
a train travels 360 km at uniform speed.if speed had been 5km/h more, it would have taken 1 hr less for the same journey.find the speed of the train.
Answers
Answered by
8
1) b² - 4ac = 0
100- 20k= 0
k= 5 ans.
2) p= 6 ans.
3) let speed = xkm/ h
time = y
360 = xy
( x+5)(y-1) = 360
so, y= 9 hr.
hence , speed = 40 km/ h.
pls ,mark as brainliest.
100- 20k= 0
k= 5 ans.
2) p= 6 ans.
3) let speed = xkm/ h
time = y
360 = xy
( x+5)(y-1) = 360
so, y= 9 hr.
hence , speed = 40 km/ h.
pls ,mark as brainliest.
Answered by
1
Answer:
40 km/ h.
Step-by-step explanation:
1) b² - 4ac = 0
100- 20k= 0
k= 5 ans.
2) p= 6 ans.
3) let speed = xkm/ h
time = y
360 = xy
( x+5)(y-1) = 360
so, y= 9 hr.
hence , speed = 40 km/ h.
pls ,mark as brainliest.
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