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Car A leads Car B by 50 meters. After three seconds the Car B is leading Car B by 30 meters. The speed of Car B is 20% more than Car A. What will be the distance travelled by Car B in those three seconds?

Car A leads Car B by 50 meters. After three seconds the Car B is leading Car B by 30 meters. The speed of Car B is 20% more than Car A. What will be the distance travelled by Car B in those three seconds? Correct Answer 480

Calculation:

VB/VA = 1.2

In three seconds Car A travelled x distance and Car B travelled x + 50 + 30.

Time is same,  

⇒ (x + 80)/x = 1.2

⇒ x = 400m

∴ Car B travelled 480m.

Important Points

If the time is the same, distance is proportional to speed.

If A is x% more than B, A = (1 + (x/100)) × B

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