Question

two cars are moving in same direction with a speed of 30km/h . they are sapereted by a distance of 5 km . What is the speed of car moving in opposite direction if it meet the two cars at an interval of 4 min ? options - a.60km/h. b.5 om/h. c.45km/h​

Answer 1

let the speed of car moving in opposite direction be v

distance =5km

velocities are added when objects are moving in opposite directions

so,

v=d/t

30+v=5/4/60

30+v=5×60/4

v=75-30

v=45