Question Bank • QB_GA_123 NAT • 2 Marks

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

A train traveling at $72\text{ km/h}$ crosses a stationary platform of length $180\text{ m}$ in $15\text{ seconds}$. Calculate the length of the train in meters.

Answer Key:

120

Step-by-Step Solution & Explanation

Speed of train: $v = 72 \times \frac{5}{18} = 20\text{ m/s}$ Total distance covered in 15 seconds: $D = v \times t = 20 \times 15 = 300\text{ m}$ Let $L_t$ be train length: $L_t + 180 = 300 \implies L_t = 300 - 180 = 120\text{ m}$
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