AFCAT Model Paper 1

Given: Length of train = 125 m Length of bridge = 62.5 m Length of railway crossing = 75 m Time to cross the bridge by train = 6 seconds Formula Used: Distance = Speed × Time Calculation: Time to cross bridge = (Length of train + Length of bridge)/Speed of train ⇒ 6 = (125 + 62.5)/Speed of train ⇒ Speed of train $= \frac{187.5}{6}$ ⇒ $\frac{125}{4}$ m/sec. Similarly, Time to cross railway crossing = (Lengths of train + railway crossing)/Speed of train ⇒ $\frac{125 + 75}{\frac{125}{4}}$ ⇒ $\frac{200 \times 4}{125} = \frac{32}{5}$ ⇒ 6.4 seconds ∴ The time taken by train to cross the railway crossing is 6.4 sec.