Question

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

Answer 1

$\mathfrak{Question:}$

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,

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

Answer 2

The velocity of the train v = 72 km/hr. The distance of the bridge is 1 km. = 1000 m. = 1100 m.