Question

Ajay and Vishal left the place ‘X’ with different speeds which are in the ratio 7:6 respectively. Ajay left the place 36 seconds after Vishal. If after 72 seconds of the departure of Vishal, Ajay is 100 meters apart from Vishal, then find the speed of Vishal.

A 16 km/hr Correct Answer Incorrect Answer
B 12 km/hr Correct Answer Incorrect Answer
C 15 km/hr Correct Answer Incorrect Answer
D 20 km/hr Correct Answer Incorrect Answer
E 18 km/hr Correct Answer Incorrect Answer

Solution

Let the speeds of Ajay and Vishal be 7x and 6x km/hr respectively. Distance covered by Vishal in 72 seconds = 6x x (5/18) x 72 = 120x m Distance covered by Ajay in 36 seconds = 7x x (5/18) x 36 = 70x m According to the question, => 120x – 70x = 100 => x = 2 Therefore the speed of Vishal = 6x = 12 km/hr

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