The correct option is D 1.5 km
Length of the track = 750 meters
So, the length of the red carpet needed to cover the track is 750 meters.
1 km = 1000 m
⇒ 750 m =7501000 km=0.750 km
To cover 2 identical tracks, the length of the red carpet needed is 0.750 × 2 km = 1.5 km.