Question

Hey guyz help me..

solve step by step plz.

don't spam​

Answer 1

Step-by-step explanation:

Let the original speed of the train = x km/hr.

Given, Distance to be traveled = 360 km.

∴ Time = Distance/Speed.

So, Initial Speed = 360/x.

Increased Speed = (360/x + 5).

Given that It would have taken 48 minutes less to travel.

⇒ (360/x) - (360/x + 5) = 48/60

⇒ (90/x) - (90/x + 5) = 1/5

⇒ 90(x + 5) - 90(x) = x(x + 5)/5

⇒ 5[90x + 450] - 5(90x) = x² + 5x

⇒ 450x + 2250 - 450x = x² + 5x

⇒ 2250 = x² + 5x

⇒ x² + 5x - 2250 = 0

⇒ x² + 50x - 45x - 2250 = 0

⇒ x(x + 50) - 45(x + 50) = 0

⇒ (x - 45)(x + 50) = 0

⇒ x = 45, -50{Since Speed cannot be negative, So x≠ 50}

⇒ x = 45.

Therefore, Original speed of the train = 45 km/hr.

Hope it helps!

Answer 2

solve the equation ... u will get ur answer...