Question

A $320m$ long rain moving at an average speed of $120km/h$ crosses a platform in $24$ seconds. A man crossed the same platform in $4$ minutes. The speed of the man in $m/s$ is

• A. $2.0$
• B. $2.4$
• C. $1.6$
• D. $1.5$

Answer 1

The correct option is A $2.0$

Speed of train $=120km/hr=120\times \frac{5}{8}=\frac{100}{3}m/s$
$Time=\frac{Distance}{Speed}$
$24=\frac{320+x}{\frac{100}{3}}$
$x=480m$
Speed of man $=\frac{480}{240}=2m/s$