Level 3
Dana places 3 boxes an equal distance from one another. The distance between the 1st box and the 3rd box is 150 cm.
  1. If Dana adds another 10 boxes that are equal distance apart, how many gaps will there be between the 10th box and the 13th box?
  2. What is the distance between the 10th box and the 13th box?
4 m