A train running at a speed of $5 m / s$ crosses a bridge $125$ m long in $80$ seconds. What is the length of the train in metres?

155

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165

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275

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180

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Solution

The correct option is A $275$ m
Let length of train be l meter
Now, total distance $= (l + 125) m$
We know that, Speed $= \frac{D i s t a n c e}{t i m e} \Rightarrow 5 = \frac{l + 125}{800} \Rightarrow l = 400 - 125 = 275 m$
$∴$ Length of train $= 275 m$

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A train running at a speed of 5m/s crosses a bridge 125 m long in 80 seconds. What is the length of the train in metres?

The correct option is A 275 mLet length of train be l meterNow, total distance=(l+125)mWe know that, Speed=Distancetime⇒5=l+125800⇒l=400−125=275m∴Length of train =275m

A train running at a speed of $5 m / s$ crosses a bridge $125$ m long in $80$ seconds. What is the length of the train in metres?

The correct option is A $275$ m
Let length of train be l meter
Now, total distance $= (l + 125) m$
We know that, Speed $= \frac{D i s t a n c e}{t i m e} \Rightarrow 5 = \frac{l + 125}{800} \Rightarrow l = 400 - 125 = 275 m$
$∴$ Length of train $= 275 m$