Question

a train speeds past a pole in 15 seconds and a platform 100m long in 25 seconds .its length is​

Answer 1

Given:-

• A train speeds past a pole in 15 seconds and a platform 100m long in 25 seconds.

⠀

To find:-

• It's length.

⠀

Solution:-

Let,

• the length of the train be x m and its speed be y m/sec.

⠀

According to the question,

⇛ (x/y) = 15

⇛ y = (x/15)

⇛ (x+100)/25 = x/15

⇛ 15(x + 100) = 25x

⇛ 15x + 1500 = 25x

⇛ 1500 = 10x

⇛ x = 150 m

⠀

Hence,

• It's length is 150 m.