A 120 m long train crosses a 330 m long bridge in 35 seconds. What time will it take to cross a platform 240 m long?
Answer & explanation
Correct answer: option 3
Total Distance (d1 : d2) = (120 + 330) : (120 + 240) = 450 : 360 = 5 : 4
As speed is same, then ratio of time & distance will be directly proportional.
Therefore,
d1 : d2 = t1 : t2 = 5 : 4
5R = 35 sec.
1R = 7 sec
4R = 4 × 7 = 28 sec.