Question
Car ‘M’ can cross a 480 metre long bridge in 16 seconds. Car ‘M’ is 128 metres ahead of car ‘N’ which is travelling in the same direction as that of car ‘M’ with a speed of 38 m/s. After how many seconds will car ‘N’ meet car ‘M’?
Solution
Speed of car ‘M’ = 480 ÷ 16 = 30 m/s So, relative speed of car ‘N’ with respect to car ‘M’ = 38 – 30 = 8 m/s Distance between the two cars = 128 metres So, time taken by car ‘N’ to meet car ‘M’ = 128 ÷ 8 = 16 seconds
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