RRB Group D 9-Nov-2014 Shift 1 Solved Paper

Question : 80 of 100

Marks: +1, -0

Two trains 121 and 99 metres in length, are running in the opposite directions, one at a rate of 40 km and the other at 32 km an hour. In what time will they completely clear each other from the moment they meet?

10 seconds
9 seconds
11 seconds
None of these

Validate

Solution:

(3) Total distance covered

=

121+99=220 {m}

Relative speed

=40+32=72 {km} \/ {h}

=72 × \;{5}/{18} {m} \/ {s}=20 {m} \/ {s}

Time taken to cross each other

=

\;{220}/{20}=11

seconds

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