1.

A travels a distance double than that travelled by B. The speed of B is double than the speed of A. If B increases his speed by 5 km/hr, the ratio of time taken by A and B is 14 : 3, the time B will take to travel 270 km with the previous speed is :1. 72. 83. 94. 10

Answer» Correct Answer - Option 3 : 9

Given:

A travels a distance double than that travelled by B.

The speed of B is double than the speed of A.

If B increases his speed by 5 km/hr, the ratio of time taken by A and B is 14 : 3.

Formula Used:

Distance = time x speed

Calculation:

Let the distance A travels be 2d and B travels d

Speed of A is x and speed of B be 2x

AB
2dd
x2x

                                                               

ATQ,

14/3 = 2d/x × (2x + 5)/d

⇒ x = 15

⇒ 2x = 30

Time taken by B = (270/30) hours = 9 hours

∴ B will take 9 hours to travel 270 km.



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