Question

Two cars A and B are approaching each other
head-on with speeds 20 m/s and 10 m/s
respectively. When their separation is X then A and
B start braking at 4 m/s2 and 2m/s2 respectively.
Minimum value of X to avoid collision is
(1) 60 m
(2) 75 m
(3) 80 m
(4) 90 m​

Answer 1

THE ANSWER IS 60 M AND 6 S