Question
Car βAβ can cross a 560 metre long bridge in 14
seconds. Car βAβ is 90 metres ahead of car βBβ which is travelling in the same direction as that of car βAβ with a speed of 50 m/s. After how many seconds will car βBβ meet car βAβ?Solution
Speed of car βAβ = 560 Γ· 14 = 40 m/s So, relative speed of car βBβ with respect to car βAβ = 50 β 40 = 10 m/s Distance between the two cars = 90 metres So, time taken by car βBβ to meet car βAβ = 90 Γ· 10 = 9 seconds
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