Question

A 300 metre long train crosses a platform in 30 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

• A. 320 m
• B. 350 m
• C. 650 m
• D. Data inadequate

Answer 1

The correct option is B 350 m

$Speed=\left(\frac{300}{8}\right)m/sec=\frac{50}{3}m/sec$
Let the length of the platform be x metres.
Then, $\left(\frac{x+300}{39}\right)=\frac{50}{3}$
$\Rightarrow 3(x+300)=1950$
$\Rightarrow x=350m$