A train of length 350 {\m} crosses a bridge of length 250 {\m} in 20 {\sec}. What is the speed of the train (in {\km} \/ {\h}) ?

SSC CHSL 12 Oct 2020 Shift 3 Paper

Question : 64 of 100

Marks: +1, -0

A train of length

350 {\m}

crosses a bridge of length

250 {\m}

20 {\sec}

. What is the speed of the train (in

{\km} \/ {\h})

Solution:

Length of train

(l)=350 {\m}

Length of bridge

(b)=250 {\m}

Time

(t)=20 {\sec}

Speed of train

={{ \Distance \covered }}/{{ \Time }}

={l+b}/{t}

={350+250}/{20}

={600}/{20}=30 {\m} \/ {\sec}

Now,

30 {\m} \/ {\s}=30 \×{18}/{5}

=180

km/h

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