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A train takes 2 hours less …

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A train takes 2 hours less for a journey of 300km if its speed is increased by 5km/hr from its usual speed.find its usual speed

Posted by Rajveer Pareek 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Sachin Kumar 6 years, 10 months ago

Answer25

1Thank You

Isha Kapoor 6 years, 10 months ago

Let the usual speed of train=x km/h ATQ 300/x = (300/x+5 )+2 300/x - 300/x+5 = 2 300x + 1500 - 300x /x²+ 5x = 2 2x² + 10 - 1500 = 0 Now u can solve it by quadratic formula

2Thank You

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CBSE > Class 10 > Mathematics