A train passes a telegraph post in 8 seconds and a 264 m long bridge in 20 seconds. What is the length of the train in metres?
Answer & explanation
Correct answer: option 2
Speed = \(\frac{Distance }{Time }\)
Let the length of the train be x
Speed = \(\frac{x }{8 }\) ---------1st equation
Speed = \(\frac{\text{x + 264} }{20}\) ---------2nd equation
From the above equations, it can be deduced that:
\(\frac{x }{8 }\) = \(\frac{\text{x + 264} }{20}\)
2.5x = x + 264
1.5x = 264
x = 176 m