Question

A train running at a speed of $45km/hr$ takes $10seconds$ to pass a certain point. Then the length of the train is

• A. $120m$
• B. $125m$
• C. $128m$
• D. $450m$

Answer 1

The correct option is B

$125m$

Step 1: Find the speed of train

Speed of the train $=\frac{(45x1000)}{(60x60)}$

$=12.5\frac{m}{s}$

Step 2: Find Length of the train

Time taken to cross the pole $=10seconds$

Length of the train$=SpeedxTime$

$$\begin{gathered} =12.5x10 \\ =125m \end{gathered}$$

Hence, the correct option is (B).