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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 |
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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
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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