Question

. A speeding train passes a sign pole in 2 seconds and a platform 100 m long
in 9 seconds. Find the length of the train and its speed.
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Answer 1

Answer:

Let the length of the train be x metres and its speed by y m/sec.

Then,

y

x

=15⇒y=

15

x

∴

25

x+100

=

25

x

⇒15(x+100)=25x

⇒15x+1500=25x

⇒1500=10x

⇒x=150