Question

if a 350m long train runs at a speed of 50km/h, then how much time will it take to cross a 150 m long platform​

Answer 1

Given

• Speed Of Train= 50km/h
• Length of Train = 350m
• Length of platform= 150m

To Find

• how much time will it take to cross a 150 m long platform?

Here's,

$~~~~~~~~~\sf \: Speed = 50km/h \\ \sf Speed= 50× \frac{ 1000m}{3600s} \\ \sf Speed= \frac{ 125m}{9s}$

$\sf \: time \: taken \: \: | \: \: \: \: \: \: 1 \: \: \: \: \: \: | \: x \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \sf \: distance \: cover | \: \: \: \: \dfrac{125}{9} \: \: \: | 150 + 600 = 750$

Direct Variation

$\implies\sf \: \dfrac{1}{ \dfrac{125}{9} } = \dfrac{x}{750}$

$\implies\sf \: \dfrac{9}{125} = \dfrac{x}{750}$

$\implies \sf \: x = \dfrac{750 \times 9}{125}$

$\implies\sf \: x = 9 \times 6$

• $\underline{\boxed{\sf \: x = 54 \: sec}}$

54 second will it take to cross a 150 m long platform.

Answer 2

Step-by-step explanation:

answer is in the attachment

hope this helps you