if anyone can help.... dont post irrelevant answers..
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Explanation:
Let the speed of the train = x km/hr
Distance = 480 km =
Time taken by the train to cover the distance
of 480 km
=
480 Х -hrs
Now, according to the given condition,
480 X-8 480 Х = 3
480 1 X-8 = 3
X-X+8 (x - 8).x 3 480
8 x² - 8x 1 160
x2 - 8x - 1280 = 0
x² - 40x + 32x-1280 = 0
x(x- 40) + 32(x - 40) = 0
(x - 40)(x +32) = 0
X-40 = 0 or x + 32 = 0
x = 40 or x = 32.
But speed of the train cannot be -ve. X = 40. Hence, the speed of the train = 40 km/hr.
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5
here is ur answer...........
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