Question discussion

A train running at a speed of 60 kmph crosses a platform double its length in 32.4 seconds. What is the length of the platform?

107173Medium 2 replies 576 views
1
A train running at a speed of 60 kmph crosses a platform double its length in 32.4 seconds. What is the length of the platform?
  • A108 metres
  • B240 meters
  • C360 meters
  • D90 meters
Answer not set
0
CCommunity
Solution
Let the length of the train be 'x' metres
Length of the platform = 2x
Distance travelled by the train = x + 2x = 3x
Speed of the train = 60 kmph = $60 \times \frac{5}{18}$ m/sec
Distance = Speed $\times$ Time
$3x = 60 \times \frac{5}{18} \times 32.4$
$x = 180$
The length of the platform = 2x = 360 m
0
CCommunity
Solution
Let the length of the train be 'x' metres
Length of the platform = 2x
Distance travelled by the train = x + 2x = 3x
Speed of the train = 60 kmph = $60 \times \frac{5}{18}$ m/sec
Distance = Speed $\times$ Time
$3x = 60 \times \frac{5}{18} \times 32.4$
$x = 180$
The length of the platform = 2x = 360 m