Question

116. Two trains, one travelling at 15 ms and other at 20 ms
are headed towards one another along a straight track. Both
the drivers apply brakes simultaneously when they are
500 m apart. If each train has a retardation of 1 ms, the
separation after they stop is:
(a) 192.5 m
(b) 225.5 m
(c) 187.5 m
(d) 155.5 m
​

Answer 1

Answer:

(c) 187.5

explanation in photo attached

Answer 2

Answer:

the correct answer is option c that is 187.5m.

explanation :

Given is

T1= 15 ms

T2 = =20 ms

we have to find out distance=?

We know that

distance of first train = (15) ^ 2)/2 = 112.5m

Similarly,

another train travels distance =

(20) ^ 2/(2) = 200m

Depration

= 500-(112.5+200)

= 500-302.5

=187.5 m

the correct answer is option (c) that is 187.5m