Question

a train 100 metre long is moving with the velocity of 72 km per hour find the time it takes to cross the bridge with 2 kilometre long​

Answer 1

Answer:

105 seconds.

Step-by-step explanation:

Refer the attachment.

Answer 2

$\mathfrak{Question:}$

A train 100 metre long is moving with the velocity of 72 km per hour. Find the time it takes to cross the bridge with 2 kilometre long​.

$\tt{Given:}$

• Length of train = 100 m.
• Speed of train = 72 km per hour = 20 m per sec .
• Length of bridge = 2 km = 2000 m.

$\mathfrak{Solution :}$

$\bf{Time =\dfrac{Distance }{Speed}}.$

Here,

Distance = Length of train + Length of bridge

So,

$\bf{Time = \dfrac {100+2000}{20}=\dfrac{2100}{20}=105\; sec.}$