Question

$\huge\bold{\underline {\underline\orange{Question-}}}$
A train crosses a bridge 100m long in 45 seconds at a speed of 60km/h.Find the time taken by the train to cross a clock tower.​

Answer 1

$\huge\bold{\underline {\underline\orange{Question-}}}$

A train crosses a bridge 100m long in 45 seconds at a speed of 60km/h.Find the time taken by the train to cross a clock tower.

$\huge \fcolorbox{red}{pink}{Answer - }$

Let the length of train be x meter.

Given:

Bridge =100 meter

Bridge =100 meter Time =45 seconds

$\small \mathcal{\underline\blue{Convert~speed~into~m/s-}}$

Speed=60×5/18

By solving speed came 50/3 m per second.

So,Total distance=(x+100)m

Time =Distance÷Speed

45=(x+100)÷50×3

45×50÷3=x+100

750-100=x

650=x

Length of train=650m

Speed=50/3 m/s

Time=650/50×3

=39seconds

Answer 2

$\huge\bold{\underline {\underline\orange{Question-}}}$

A train crosses a bridge 100m long in 45 seconds at a speed of 60km/h.Find the time taken by the train to cross a clock tower.

$\huge \fcolorbox{red}{pink}{Answer - }$

Let the length of train be x meter.

Given:+

Bridge =100 meter

Bridge =100 meter Time =45 seconds

$\small \mathcal{\underline\blue{Convert~speed~into~m/s-}}$

Speed=60km/h

$speed \: = 60 \times \frac{5}{18}$

$by \: solving \: speed \: came \frac{50}{3}$

So,Total distance =(x+100)m

$time = \frac{distance }{speed}$

$45 = \frac{x + 100 \times 3}{50}$

$\frac{45 \times 50}{3} = x + 100$

750-100=x

650=x

Length of train=650m

$speed = \frac{50}{3}$

Find,Time taken by train

$time = \frac{650}{50} \times 3 = 39s$

$\large\boxed{\fcolorbox{red}{yellow}{Hope it helps}}$