Ravi is driving at a speed of 40 km/h on a road. Vijay is 54 meters behind Ravi and driving in the same direction as Ravi. Ashok is driving along the same road from the opposite direction at a speed of 50 km/h and is 225 meters away from Ravi. The speed, in km/h, at which Vijay should drive so that all the three cross each other at the same time, is
Explanation:
Speed of Ravi = 40 × 5/18 = 100/9 m/s and Ashok = 50 × 5/18 = 250/18 m/s
Time taken for them to meet = 2251009+25018 = 225×18450 = 9 secs.
⇒ Vijay and Ravi should also meet in 9 secs. ∴ 9 = 54V-1009
⇒ 9V - 100 = 54
⇒ 9V = 154
⇒ V = 154/9 m/s = 154/9 × 18/5 kmph = 61.6 kmph
Hence, option (c).
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