A truck Travels at a certain average speed for a distance of 150 km and then Travels a distance of 200 km at an average speed of 20 km/hour more than its first speed. If it takes 5 hours to complete the total journey, find its first speed.
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Let 1st speed = x
Time1 = s/v
= 150/x
Time2 = s/v
= 200/x+20
T1+T2 = 5
=> 150/x + 200/x+20 = 5
=> 150(x + 20) + 200x
–––—————————. = 5
x × (x+20)
=> 150x + 3000 + 200x
-------------------------------. = 5
sq.x + 20x
=> 350x + 3000 = 5x^2 + 100x
Please solve it ahead my time is over now....
And mark it as the brainliest.
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