Question

Two particles A and B get 4 m closer each second while
travelling in opposite direction. They get 0.4 m closer every
second while travelling in same direction. The speeds of
A and B are respectively
(a) 2.2 m s' and 0.4 ms (b) 2.2 m s' and 1.8 ms
(c) 4 ms and 0.4 ms (d) 2.2 ms and 4 ms
• A train of length 200 m travelling at 30 m/s overtakes​

Answer 1

Answer:

B 2.2 and 1.8

Explanation:

Here we can make a linear equation in two variables

V relative when in same direction

=X+Y=4 assume that x is greater than Y

V relative when in same directions

X-Y=0.4

Then solve both equations

X=2.2 Y=1.8