A train 400 m long travels at a speed of 36 kmph. Find the time it would take to cross a platform 300 m long.
Answer & explanation
Correct answer: option 4
Speed in m/s = 36 x \(\frac{5 }{18 }\) = 10m/s
time = \(\frac{distance }{speed}\)
time = \(\frac{\text{400 + 300} }{10}\)
time = \(\frac{700}{10}\)
time = 70 seconds