1.

The difference between the speeds of A and B is 10 km/hr. To travel a distance of 600 km, B takes 3 more hours than A. Find the time B will take to cover a distance of 2400 km.1. 702. 603. 504. 80

Answer» Correct Answer - Option 2 : 60

Given:

The difference between the speeds of A and B is 10 km/hr.

To travel a distance of 600 km, B takes 3 more hours than A.

Formula Used:

Distance = time x speed

Calculation:

Let speed of A be x km/hr and speed of B be (x – 10) km/hr

ATQ,

600/(x – 10) – 600/x = 3

⇒ x2 – 10x – 2000 = 0

⇒ x = 50, - 40

But x cannot be - 40,

So, it will be 50

So, the speed of B = (50 – 10) km/hr = 40 km/hr

Time = (2400/40) hours = 60 hours

∴ B will take 60 hours.



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