Question

The speed of train A is x km/h and speed of train B is (x – 5) km/h. How much time will each train take to cover 400 km?

Options

• `x/400` hrs and `(x - 5)/400` hrs

• x × 400 hrs and (x – 5) × 400 hrs

• `400/x` hrs and `400/(x - 5)` hrs

• `800/(x(x - 5))` hrs

Answer 1

`bb(400/x hrs and 400/(x - 5) hrs)`

Explanation:

Time taken by train A to covered a distance of 400 km @ x km/h

= `"Distance"/"Speed"`

= `400/x` hrs

Time taken by train B to covered a distance of 400 km @ (x – 5) km/h

= `400/(x - 5)` hrs