Question
Download Solution PDFTwo trains P and Q of lengths 320 m and 540 m, respectively, are running in the same direction on parallel tracks at 108 km/h and 144 km/h, respectively. How much time will the trains take to cross each other completely?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Length of 1st train (T1) = 320 m
Length of 1st train (T2) = 540 m
Speed of 1st train (S1) = 108 km/h
Speed of 1st train (S2) = 144 km/h
Formula used:
Distance = relative speed × time
Calculation:
Distance = relative speed × time
⇒ (T1 + T2) = (S2 - S1) × (5/18) × time
⇒ (320 + 540) = (144 - 108) × (5/18) × time
⇒ 860 = 36 × (5/18) × time
⇒ Time = 860/10 = 86 sec.
∴ The correct answer is 86 sec.
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