RRB RPF RPSF SI and CONS Model Papers 1 with solutions

Question : 35 of 120

Marks: +1, -0

Two trains 108 m and 112 m in length are running towards each other on the parallel lines at a speed of 45 km/hr and 54 km/hr respectively. To cross each other after they meet, it will take

10 sec
12 sec
9 sec
8 sec

Validate

Solution:

(d) Relative speed =

( 45 + 54 ) = 99 k m \/ h r

= { 99 × 5 }/ { 18 } m \/ \sec

Distance covered in crossing each other

= (108+112) = 220m

Required time

= { 220 }/ { 99 }× { 18 } /{ 5 } = 8

sec

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