| | Question 11

Two jeep start from a police station with a speed of 20 km/hr at intervals of 10 minutes.A man coming from opposite direction towards the police station meets the jeep at an interval of 8 minutes.Find the speed of the man.
(A) 2 km/hr
(B) 3 km/hr
(C) 4 km/hr
(D) 5 km/hr


Answer: (D)

Explanation:

                 Bus             Bus + man
Ratio of time   10 min    :        8 min
Ratio of speed   8        :         10
                 4        :         4+1

Here, 4 units -> 20 km/hr
1 unit -> 5 km/hr
Speed of the man = 1 unit = 1 x 5 = 5 km/hr

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