Question

a train 180 m long passes a telegraph post in 12 seconds how much time will it take to pass a platform 135 m long​

Answer 1

Thanks for your question!! ✌✌

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Firstly,

The observation says it's direct proportion.

Let unknown time be x

Now,

180 × X = 135 × 12

=) (135 ×12 ) ÷ 180

=) 9

Answer : 9 seconds

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THANKS

✌✌

Answer 2

let the time which is not know to us be


$x$

so atq


180x = 135×12

$x = \: \: \frac{1620}{180}$


=>
$9$

hope it works ⬆️⬆️⬆️⬆️⬆️